I think it's excellent, as a trial site, roll on the real thing.
Is it just me, though? At the side of the surname box is a ? button, and it advises using a wildcard or variant search, but I can't see one anywhere.
Entering Joh* and Smi* would turn up no results at all, but just putting surname SMITH would turn up lots (just an example, not looking for a John Smith thank goodness).
I have emailed them - perhaps the variants search will be in the full version
