
Plenty of down sides, as well as positive sides, in a RR :p
It all depends on what you look for in a dog. What to me is something very positive, might be a down side to someone else.
A RR is an intelligent dog, it will learn almost anything very quickly. But, will also tire of any activity very fast. Not a good side if you like to train and compete in obedience work. If you have a go at doing obedience on a seriuos level with your RR, a good sense of humour is a must :D
A grown RR is rather independent, and not overly interested in people it doesn't know. Don't expect your RR to love everyone just because they happen to be your friends. A RR likes to choose who's his friend, and who's not. Not all RRs are the affectionate type. Some are, some not. Don't be surprised if a RR gets up and walks off when you feel like a cuddle.
A RR will form a very strong bond with its owner. This means to the RR any time spent separate from its leader is wasted time. You can't compensate lack of time together, with hard work/training, to make up for spending time away from your dog, like you sometimes can with a working breed.
A young RR will test almost every rule you can think of. If it's not OK to get up on to the sofa from the right hand side, lets try the left. Or maybe the middle? Or maybe it was just forbidden ten minutes ago, not now ;-)
A grown male RR will not get on very well with other males. They'll learn to tolerate dogs they meet, and behave themselfves, but not much more. It's possible to keep two entire males together, I have several friends that do, but it takes a knowlegable owner to make it work.
A RR MUST get plenty of socialisation when young. Both with people, dogs, other animals and different environments. Otherwise you risk getting a nervous and insecure dog, that isn't half the dog it could have developed into, had it gotten the right socalisation when young.
I could go on and on, but wont :p Try to find a breeder that will let you visit, and who will answer your questions about the breed.
Good luck,
Karen