Got one myself that my parents gave me but having no tow-bar and an old car I’d rather not but extra stress on, it sits in the garage.
They’re great fun and very useful. Ours has a cooker/sink unit that attaches to the back of the trailer. The only problem I ever had with them is the time it takes to put the awning up on the front of it. You don’t have to put them up, but it does give you allot more room. They do give you more space that most standard tents, and the sleeping can quite often be more comfortable.
The only way I’ve seen you can put bikes in them/on them while traveling is by using the bars in Stoner’s post.