Re:
'Is it a keeper?' Perhaps. When I first got it, I tested it out, but with a rotten bottom bracket, dodgy brakes, etc. and it seemed like it had potential. On the one hand, I was wary of getting something too low end that feels like a leaden lump; on the other hand, I noticed that of all the lower end bikes the Hardrock seems to get the most love and respect on Retrobike.
The overall cost of paint spray will come to about £50 and I had to pay £10 in the end to get the bottom bracket out. Almost everything else will transfer to another frame if I'm not happy with it - Avid SD7s, new tyres, etc.