Description
The LG MSER1590S is a recent countertop microwave built around LG’s NeoChef inverter platform. LG records 1.5 cubic feet, 120 volts AC, a listed weight of 32.2 pounds, dimensions of 25.6 by 18.6 by 13 inches, stainless steel inside and out, touch controls with a touchscreen human interface, and first availability in February 2025. The described features are the NeoChef Smart Inverter, SmoothTouch controls, a child lock and an EasyClean interior.
What it is and where it fits in a home
At 1.5 cubic feet this sits between the mainstream 1.2 cubic foot units and the 2.2 cubic foot large cavity models, which is a sensible place to be for a family kitchen that does not want to give up the whole counter. The published dimensions of 25.6 by 18.6 by 13 inches are on the large side for that cavity and are worth treating as approximate, since figures in that range across this catalog frequently describe the shipping carton.
Its natural buyer is someone replacing a tired countertop microwave in a kitchen that already has an oven, who wants a better interface and better low power behavior rather than more cubic feet. Against the Toshiba EM131A5C-BS at 1.2 cubic feet, the extra 0.3 cubic feet is a real if modest gain. Against the Sharp SMC2266KS at 2.2, it gives up a lot of capacity for a much smaller footprint.
Living with it day to day
Inverter power delivery is the technical feature worth understanding. A conventional microwave running at 50 percent power actually runs the magnetron at full power for half the time and switches it off for the rest. An inverter design runs it continuously at a genuinely lower level. In daily use that changes softening butter, melting chocolate, holding a sauce warm and reheating delicate leftovers, all of which behave better without repeated full power bursts. For anyone who only ever uses full power it changes nothing at all, and that is the honest limit of the feature.
1.5 cubic feet takes a dinner plate with rotation clearance, a 3 quart casserole and most everyday containers. LG does not publish the turntable diameter, which is the figure that would settle whether a large platter turns, so that is a gap rather than something to state.
The stainless steel interior with LG’s EasyClean coating is the durable option and takes repeated cleaning better than a painted cavity. LG publishes no decibel rating, so noise cannot be compared on paper.
One thing worth flagging honestly: the listing shows only six customer ratings at a 3.7 average, which is far too small a sample to conclude anything about reliability in either direction. It is mentioned here because a low rating on a handful of reviews is easy to misread as a verdict, and it is not one.
Controls and what still works without an app
LG publishes no Wi-Fi, no ThinQ integration, no app and no voice control for the MSER1590S, so despite the touchscreen interface this is an entirely local appliance. Everything works with power and nothing else, which is a different position from LG’s over the range units such as the LG MVEL2137F where Scan to Cook depends on a phone.
SmoothTouch is a flat glass control surface rather than raised buttons. It wipes clean in a single pass with no crevices to trap food, which on a countertop appliance in a working kitchen is a practical advantage. The tradeoff is the usual one for capacitive glass: no tactile feedback and less reliable response with wet fingers. The child lock is a genuine safety feature on a unit at counter height where children can reach it, and it is worth setting rather than leaving off.
Running cost and upkeep
No filters, no water line, no drain and nothing on a replacement schedule. Upkeep is the turntable washed and the EasyClean cavity wiped, and a stainless interior is the easiest of the three common cavity materials to keep looking right over years.
The wear items are the turntable and roller ring, the door latch and switches, the interior lamp and the touch panel. The inverter board is the one additional electronic component compared with a conventional transformer design, and it is the part most associated with failures on inverter models generally. That is an observation about the technology rather than an LG specification, and nothing on this listing speaks to reliability either way.
The electrical gap on this listing is unusual and worth naming. LG publishes 120 volts AC but no wattage at all, in any field. For a microwave, the cooking output rating is the single most useful specification after capacity, and its complete absence means the speed of this oven cannot be compared against anything else in this catalog on paper. It also means the input draw, the amperage and any circuit requirement are entirely unstated. The rating plate on the back of the unit is the only source, and it should be read before deciding which outlet it shares.
Highlights
- Inverter power delivery, which genuinely improves low power tasks such as softening and melting.
- Stainless steel inside and out with an EasyClean coating.
- SmoothTouch glass wipes clean in one pass, with no crevices around buttons.
- A child lock, which matters on a countertop unit within reach.
- Entirely local operation despite the touchscreen interface, so nothing depends on an app.
Things To Consider
- No wattage is published anywhere, so cooking speed cannot be compared with rivals at all.
- No turntable diameter and no noise rating are published either.
- Published dimensions are large for a 1.5 cubic foot cavity and may be carton figures.
- The inverter board is an additional component compared with a conventional design.
- Flat glass controls give no tactile feedback and can be unreliable with wet fingers.
Who it is not for
Anyone who needs to know the cooking output before buying should not choose a listing that does not publish it, and the GE GCST10A1WSS states 1200 watts plainly. Households that reheat large family dishes need more cavity. Anyone who wants convection or air fry needs a combination unit from the countertop category. And people who dislike flat glass controls, or who cook with wet hands constantly, will be happier with a keypad model.
