Personally, I just purchased a lump-sum of Ninebot-es2 and es4 models from a Police auction (they were confiscated bird scooters). I just replaced the dashboard and went about using them for personal commuting. The range sucked, I'd be lucky to get 3.5 - 4 miles at 16mph to my office, which meant I had to charge on both ends. This is what lead to my purchase of an KS18xl electric unicycle.

However, there are more and more slim carbon fiber "micro" electric scooters entering the market that look absolutely incredible!

My wife and I just bought the xiaomi/ninebot one, they are around 15kg but fold down fairly nicely, I won't lie and say it's ideal, but it wasn't much of a challenge getting them in and out of our apartment (which, being in HK is tiny:))

Weight is weight of course, but I've seen ones where they fold up so that you pull it behind you on one of its wheels, like one of those rolling suitcases.

eMicro escooters are light and pretty powerful, but range is not the best.

Egret escooters have better range but are heavier.

Both brands are well built and durable, but not cheap.

I've had my Egret 10 for over a year, use it every day on rough roads with heavy loads and it's held up nicely. I did break the trigger going over a pothole, but was able to fix it myself. Otherwise only changed the back tire and brake pads (standard parts).