FIIDO X upgraded Folding 250W Electric Bike, Mountain Bike, Folding Bikes, motor power 250W, speed 32 KM/H, tire 20 Inch, battery power 10 AH, Available on cycle to work scheme/bike to work scheme.
pogocycles.com
Overkill or a more „sensible “ upgrade over D21?
It's not my cup of tea. The logical development of the D11 was to add a true Torque sensor; that gave us the D21. The X (or D31 as Fiido have sometimes referred to it) was a further/later development still; a lighter-weight cast magnesium frame, Torque sensor, hydraulic brakes, novel electronic battery/bike lock.
In the event, the X/D31 weighs 2.3kg MORE, not less as intended. The electronic keypad and lockable battery post are IMHO a longer term liability (unnecessary complication). It does add better hydraulic rather than mechanical disc brakes too but also adds £250 cost.
For clarity: D11 Cadence you just need to turn the pedals for assist; you can choose to put in more or less effort. The D21/D31 Torque determines assist based on how much pressure you actually put into the pedals: Some see that as a more natural cycling experience.
What rides beyond your commute were you intending to use the bike for?
All these Fiidos have a 417Wh battery, and that gets (heavy/unfit) me 35+ miles easily without being frugal. Wisper's 806 has the options of 375, 575, or a massive 700Wh if you need that longer range/distance.