I just started using West Systems Epoxy with both the "Fast" and "slow" hardeners. I really like everything about it, so far. If you do go this way, be sure to get the appropriate pumps. Both hardeners mix with the resin ar a 1:5 ratio (5 parts resin to 1 part hardener), and it works by Volume or by Weight.
I do keep all the resin/hardener cans in a small box lined with paper towels to catch drips, but there haven't been any! Set-up times and Cure times are very close to the claimed performance. Temperature is important: Use the Slow Hardenerwhenever the temp is above 70, or pot-life will grab you. Likewise, use the Fast Hardener whenever temps are under 60, or set-up time is excessive.
Observe warnings regarding total volume, containers, and cleanliness and you'll be OK.