The 150cc scooter was introduced to the UK in the early 1990s. As is the case with any significant new innovation, there were a number of early sellers who got it right; others who did not. In this case, I will list a couple of companies that have been proven to be reputable sellers of this type of scooter. These companies are Kaylor and Honda. They make superb products and should be held in high regard.
A couple of years ago I bought my 150cc scooter. It took me a while to understand the way in which everything worked, but I soon found that it performed as well as any other scooter on the market. I was surprised to discover that it had fewer problems than many other models of scooters at that time and also discovered that it was relatively easy to maintain. After a little bit of use, I found that I could keep it running for a longer period of time before needing maintenance. It also seems that it does not rust or suffer from problems like other models do.
Over the years that I owned my scooter, I have taken it on several different family outings, including camping trips and mountain biking. It has always performed admirably, and I would highly recommend it to anyone. The only caution I would offer here is that you need to be especially careful when taking it on rough terrain. If you are planning to purchase this type of scooter, I would look for a model that is made of higher quality metal.