I own one, and with a little work they're a decent enough gun, but I can't really recommend buying one new. $600 is just too much for what you get. Look around for a used one. Within 2 months of buying mine, I saw a used India pattern for $400 and a Ranger model for $300.
As far as work goes, the main problem mine had was the trigger. In the beginning it was so bad it was for all practical purposes unshootable. After disassembling it and doing some filing, polishing and bending however I now have it down to around 5 lbs and smooth and crisp.