Description
The Ninja SS151, sold as the TWISTi, takes a feature from high torque blenders and builds it into a compact machine. Ninja records a 34 fluid ounce capacity, dimensions of 6.5 inches deep by 8.3 wide by 13.8 tall, five speeds, 120 volts, corded electric power, physical buttons and a twist tamper as the control type, BPA free materials, stainless steel blades, a limited warranty, a listed weight of 7.19 pounds, a China country of origin, a 2021 manufacture year and first availability in March 2022. Included are the blade assembly, a power pitcher, the motor base, an inspiration guide and a serve cup with lid. The description adds a 1600 peak watt motor, Hybrid Edge blades and SmartTORQUE.
One small data fault to note: the color field reads Platnium, a misspelling of platinum, which is an import artifact rather than a variant name.
What it is and where it fits in a home
The built in tamper is what distinguishes this. A tamper is the tool that makes thick mixtures possible: nut butters, smoothie bowls and frozen desserts all need ingredients pushed down into the blade because they will not circulate on their own. Vitamix machines such as the Vitamix VM0197 Explorian supply a separate tamper that goes through a hole in the lid. Ninja has instead built the tamper into the lid so it twists from outside.
At 34 ounces this sits between the personal blenders such as the Ninja QB3001SS and the 72 ounce jug machines. That is a deliberate middle position: enough for two drinks or a smoothie bowl, small enough that a single serving does not mean washing a large pitcher. At 13.8 inches tall it is also short enough to have a chance of fitting under a wall cabinet, which the 17 inch machines do not.
Living with it day to day
The tamper is the feature that changes what the machine can make. Without one, a thick smoothie bowl mixture cavitates: the blade spins in a pocket of air while the mixture sits above it untouched. With a tamper you keep pushing it down and it blends. Building it into the lid means it is always present rather than being the accessory that goes missing in a drawer, and it means the lid stays closed while you use it.
SmartTORQUE is described as maintaining performance under heavy loads. In practice that means the motor controller holds speed rather than bogging down when a thick mixture loads it, which is the complement to the tamper: the tamper feeds the blade and the torque control keeps the blade turning.
Five speeds is a middle amount of control, more than the three on the Nutri Ninja BL642 and fewer than the ten on the larger machines. Hybrid Edge blades combine crushing and chopping geometry in one assembly.
The 1600 figure is a peak watt rating, meaning maximum momentary draw rather than a continuous rating. Ninja publishes no decibel figure, and a machine of this power in a small pitcher is loud.
A serve cup with lid is included alongside the pitcher, which is the sensible pairing for a smoothie bowl machine: blend in the pitcher, serve into the cup.
Controls and what works without an app
Nothing here connects to anything. No app, no Wi-Fi, no account, no display beyond the speed indication. Physical buttons and the twist tamper are the whole interface.
The control type field is unusually honest about that: it lists physical buttons and twist tamper together, which is accurate, because on this machine the tamper is genuinely part of how you operate it rather than an accessory. Buttons work with wet hands and give tactile feedback, and SmartTORQUE is a motor controller inside the base rather than anything that reaches a network. Nothing here can be deprecated by a software decision, which is the right architecture for a kitchen tool used in bursts.
Running cost and upkeep
No consumables and nothing on a schedule. Electricity is negligible for a machine used in short bursts.
The wear items are the blade assembly, the pitcher gasket, the drive coupling and, uniquely here, the tamper mechanism in the lid, which is a moving part that a plain lid does not have and which is exposed to the same thick mixtures it is pushing. That is one more thing that can eventually fail, and it is the cost of building the tamper in rather than supplying it loose.
The pitcher, blade and lid all need washing, and a lid with a mechanism in it is more work to clean properly than a plain one, since thick mixture gets into the tamper shaft.
Electrically, Ninja publishes 120 volts. The 1600 watt figure is a peak rather than a continuous rating and no amperage is published, so it should not be used to plan a circuit. The rating plate on the base is the source. A limited warranty is stated without a term, which is a gap.
Highlights
- A tamper built into the lid, so thick mixtures blend without opening the machine.
- 34 ounces is a sensible middle size between personal and family batch.
- SmartTORQUE holds speed under load, which is the necessary partner to a tamper.
- At 13.8 inches tall it may fit under a wall cabinet where taller machines will not.
- Voltage is published and a serve cup with lid is included.
Things To Consider
- 1600 watts is a peak figure rather than a continuous rating, and no amperage is published.
- The color field is recorded as Platnium, a misspelling in the listing data.
- The warranty is described as limited with no term stated.
- The tamper mechanism in the lid is a moving part that needs cleaning and can wear.
- No decibel figure is published, and this is a loud machine for its size.
Who it is not for
Households blending for four or more will find 34 ounces too small and should look at a jug machine in the countertop blender category. Anyone who only makes thin smoothies gains nothing from the tamper and could buy simpler. Anyone who wants a single vessel to blend and drink from should look at the personal size blender category. And anyone whose main requirement is quiet operation should note that this listing publishes no noise figure and no suppression, unlike the Breville Super Q.
