I've been using the Animas 2020 pump since late November 2008. At the time that I was trained, the nurse showed me both the 90° and the 30° automatic infusion sets, but she didn't recommend either because she claimed it's common for the tape to get all bunched up when you use them and you end up wasting a whole set. Instead, she introduced me to the Comfort Short infusion set. It is a manual type, so you have to actually inject it yourself, on an angle of between 15 and 45°.
At first, being new to the whole thing, I would get so nervous when it came time to change my site that I would shake like a leaf when it came to inserting the needle, which made it a little more difficult. However, after about 4 or 5 times, I became a lot more comfortable with the whole idea and now it is pretty much painless and effortless! I guess the only limitation is that you cannot be afraid of needles, as I understand that some diabetics still are!
The other thing I just tried was changing the location for my site. Until now, I was always using my abdomen, simply rotating from one side to the other. This morning, when I had to change my site, I decided to use the side of my thigh, just to try something different. So far so good!