I have two scooters and a bike. The bike is for fun and local travel, the scooters are for the commute/other train travel. The small one is this one and I use it for ad-hoc travel when I don’t want to be encumbered and/or don’t know the area I’m going to. The larger scooter still folds up but has 16" pneumatic tyres and rides like a dream. Being able to alternate between road and pavement in London when the traffic feels unsafe is great. It’s also almost half the weight of a Brompton. I love it.
My main piece of advice is not to buy new unless you’re particularly flush with cash. People are always trying scooters, deciding they’re not for them, and selling them on. You can always pick one up second hand.