Our company settled on using TimeStor and it's "cousin", TimeBox, awhile back after trying a few different time tracking systems. We're glad we did. They've been a breeze to set up, and we haven't had any problems at all with them. The feature sets are about right for a company of our size; we had one additional "wish list" feature that we contacted the develop about, and he obliged with adding it for us in the next release.