I'm a lucky French owner of a Treo 600. GSM on Orange

I would like to ask you a question about the vertical Covertec case with this swiffle clip.

I'm using a Nokia 3300 case at the moment (only partly usuable) but am interested in the Covertec model because it covers the phone (and screen) very well.

My doubt is this belt clip.
I had that once (Nokia 6210) and abandonned it because the phone sticked too far out and sometimes I got "stuck" in my car door.

Is there a user out there that could give me his opinion?

Thanks in advance,