The paraframe 2? I have the serrated version of both the 1 and 2, and one of my boy's has the non-serrated para 2. No problems opening them one-handed, and for their price (on ebay anyway) I think they are very good value. The framelock works very well and they can be closed one-handed.

I've used the ara 1 on rafting trips, with no sign of rusting.