I have used 550D, 60D and 7D. This is my take:
I started off with the 550D. It is a marvellous camera. I learnt through this camera, the different aspects of photography. After a few months, I started to look around for a change of camera. Reason because after shooting for a few months, I felt that the size is really too small for me and I sometimes can feel that my hands are not steady due to the extreme light weight. In addition, because I am mostly taking picture of my kids, I needed a slightly higher FPS.
At that point, 60D was just launched. After reading about the tonnes of negative reviews, I totally ignored it as an option. I borrowed my friend's 7D to try out on a few occasions. It is only at this point that I realised that the 7D is not my cup of tea. Other than the better grip and higher FPS, I find all other functions too complicated for me. I only shoot for leisure and as a hobby. Many people mentioned that the 19 cross type AF is excellent, but that to me is the most hated part, because I don't seem to be able to use this function to the best of it's ability. In addition, the smaller LCD screen is not to my liking also.
Ended up, I went to Canon showroom one day, lifted up the 60D in my hand, and I have not look back since. I term it as a "VALUE FOR MONEY" camera, which has all the functions of the 550D, but with better grip, articulating LCD is a very nice function too, because ever since, I am able to take my pictures in different perspective. Lastly and most importantly, the pictures produced are just wonderful.
After using the 60D for 1 month, I came to realise that most people who complain that 60D no good actually never use this camera, and just rely on the specs and online reviews, which is a joke (By the way, there's a website that review the 18-135 lens as an excellent lens :bsmilie

To TS, you need to understand that these people have probably been using the semi-pro or pro series camera for a while, so the 60D may not be suited. But for someone who is just starting out, I assure you that you will be "rubbishing" all the reviews and online critics after your very first outing with the camera.
With the price difference of around $800 now (60D is $1400, 7D is $2200), you can always use it on a good piece of lens, such as the 17-55 f2.8 or 15-85 f3.5-5.6.
Just my thoughts.
