Ok I know I am a late starter

But I am just a NEW EBay user. Signed up on Thursday & biding for LOTS
I wanted to ask if any here use E-Bay a lot? If yes do you use any Tools to Buy?
Like:
http://www.auctionlotwatch.co.uk/lotsnipe.html or any site/program to show whats only got 1hr left (or less) & is under £1
The
http://www.auctionlotwatch.co.uk/lotsnipe.html looks GOOD, but is it 1) Allowed, & 2) Safe?
Cheers