Yes, I think they are trustworthy. Based on my experience anyway. They have pretty good customer support as well.
To be honest I'm somewhat weary of *ANY* on-line credit card transactions myself so the card I use for on-line payments has a ridiculously low limit on it. It becomes even lower because I don't always pay my credit card bills on-time.

So even if there's some risk to my credit card info leaking out and being used by someone else there isn't much that could potentially be charged to it.
-ED-
[This message has been edited by 3351 (edited 12-30-2006).]