250 S is among the fastest (acceleration, top speed) 250 cc scooters and even faster than some 300 cc scooters.
Regular 250 has 2 or so hp less which is a lot for such low power, slighlty different engine, one front disc and not two, it is quite slower.
250S is made of sub-standard materials (all non-aluminum metal parts rust easily), seat is crappy for long drives, it has twin front brakes which does not show much while driving but front brakes tend to lock easily and then front wheel likes to slide in one side. Low clearance so you are likely to hit the ground with CVT/engine casing when going off the curb. Rear suspension is made for light load so if you load it with more than 220 lbs it tends to bottom out on potholes. Front suspension is also quite sh**ty but not more than on other scoots. It suffers from some issues (for example, mine had leaky engine casing replaced under warranty around 7000 kms), but electricity you mention is not one of them, except speedo cable that dies around 10K kms. Consumption is average (4-4.5 l, add 15 % for lying tacho influence). Tacho is lying 15 % from very beginning. Tends to widen the trajectory when exiting corner heavily which is very dangerous. Very awkward sitting position with toes pointed inward (never saw something like that on other scoots). It is considered to be one of the ugliest big scoots by most people (design grows on you as the time passes). Doing anything mechanically on it is a nightmare, it takes several hours to access hoses and radiator to change coolant, for example, or even to change brake fluid because everything is covered by plastics.
Most likely you will hear none of these because most people drive it "on weekends" and never tried to go fast with it or push it through the corners. I drive it daily for the past 2.5 years, 365 days/year.
So, I would say, if you are decisive about 250 cc, go for it. Most scoots are equally sh**ty and due to layout they simply cannot be made better. Most people are biased and tend to overanalyze things (read threads about oil and stufff like that on the forum), but it really comes to your own personal luck in the end -- will it break soon, what will be the cost, what will break etc. You cannot influence any of that.
