I've been using the Clikstar for under a year now, the Autopen 24 was horrible and I had really bad bruises from it. Went to my DSN and she gave me 2 on the spot (i'm sorry for those that don't have easy access to one, fingers crossed you get one soon)
The thing with the Clikstar is the size of it, its double the thickness of the Autopen, however I soon got use to it and I appriecate that I can control the injection flow.
I like that my Lantus is not in a disposable pen, as my Novorapid is disposable and I hate that I have to throw the pen away.