I have commuted to the City regularly on a 150cc motorbike and then a 500cc for about ten years. I sold the motorbike last year as it was just outside the ULEZ rules cutoff, otherwise I'd have kept it. I chose not to get another bike, which was a big decision. Lots of good advice above. I'd add. Parking - sounds like this hasn't really been explored. Public bays are always full around me in the City. For this reason alone I wouldn't rely on them. I had underground carparks at all my workplaces, if I didn't I wouldn't have commuted by bike. It's that simple. Security - scooters are very stealable. I wonder if you're parking it on the road at home whether good locks are enough. Weather - you'll need kit for cold and rain. It's more cost and it might be a hassle to store at work. All that said, it was a fast and reliable way to get to work and often enjoyable. Now that I'm back on buses and trains, which are relentlessly disappointing, I do miss the bike. Then again, factor in the many idiots on the road, including pedestrians, clueless/aggressive cyclists, drivers etc and I am quite glad not to be part of it. The pollution is also very in your face. I'd agree 50cc isn't enough. 125cc or 150cc is fine. If you're interested in a helmet, gloves, jacket etc at a very cheap rate then let me know via DM. Cheers