I have owned my prius for nearly 3 years, it has only let me down once when the aux battery discharged and would not start the hybrid system. From articles on this site, I think it was probably my fault, it has made me more careful, but still enjoy driving one of the best cars I have ever owned. There is some very good information and advice available in the forums.
Welcome to PriusChat, Chris! After three years I'm sure you know a lot about your Prius, but there is probably more to learn! I know I'm still learning. Glad to have you join! There are several drivers in the UK, you might want to check out the International Forum. While Toyota sells different Prius in different countries, they are more the same than different, and it's fun to see what those differences are.
I just talked a new Prius owner through the process of jumping a dead battery. You aren't the only one who has done this. Welcome to Prius Chat. Tom
