Here is a photo of a Stinger trailer that I use.
The drawbacks- in my opinion, are as follows: 1)It can only haul one bike, 2) It's expensive.
The good- 1) It folds up extremely compact, so it fits in my garage without taking up a lot of room. 2) Super easy to load any kind of bike.
It is built very heavy- good enough for heavy road bikes, such as HD's and GoldWings, so the company claims.