I have a few of these, both CVA and Traditions (basically identical).
Cowboy, there are replacement locks made by L&R that should essentially drop-in (I think they may require a wee bit of deepening the inlet for the lockplate). The L&R locks are supposed to be quite nice. Of course, if it works just fine as-is, there's not necessarily any need to replace the lock, but it's a nice option to have.
For the money, I think they are quite a decent introduction to muzzle-loading. I don't know why I have several of them... I pick them up whenever I come across one in good condition for a good price. I keep thinking someday they will be worth more, or perhaps I can give them to friends and youngsters who show an affinity for muzzleloading.