Is the Esazn ZT-E20-SL-T good for daily commuting?

Yes, for short urban trips. The 20-inch wheels and aluminum frame make it easy to store and maneuver, and the 7 speeds handle gentle hills. It is less comfortable on long or rough routes.

How does it compare with a full-size e-bike?

It is more compact and easier to carry, but full-size e-bikes roll more smoothly and are more stable at speed. Choose this one if storage and portability matter more than ride comfort.

What is the battery range?

The listing does not state battery capacity or range, so ask the seller before buying. Range depends heavily on rider weight, assist level and terrain.

Can it fit shorter and taller riders?

It is a unisex adult frame, but seat and handlebar adjustment ranges are not published. Check the geometry with the seller if you are near the height extremes.

Are the brakes and gears easy to maintain?

Disc brakes and a 7-speed drivetrain are common standards, so most bike shops can service them. Parts for the motor and battery may be harder to source for a smaller brand.