I bought it and it seems to be good, though some of it is a little misleading.

The Crazy Egg offer claims to be worth $228 for a year, which would make you think that you're getting the $19/month plan, but it's actually a plan that's 1000 visits per month and only tracks one page (<5% of the $19/month plan).

The Clicky offer claims to be valid for both new and free users, but there's not a way to upgrade a free account with a discount code, and the Clicky guys haven't yet responded to my email. (I'll update here when they do.)

Clicky Update: They had to manually perform the upgrade. All's good.