Not a worthwhile deal for .CAs (like maple said) but good prices for the other extensions.
Thought I'd mention it since I took advantage for some of my .COMs, and .COM prices will be increasing soon, so now is the time if you want to save a few bucks.
I will probably transfer a bunch more before the deal is over as these prices are almost all at least a dollar cheaper than anywhere else. I also paid in US funds, so here are the prices in USD:
I've also been transferring a few to Sav.com lately since their prices are always cheap (with no special sale), but these current prices at Namecheap are still cheaper atm (except for .me, and .info, which are still cheaper at Sav).
Here's how the prices compare with Sav.com, with no sale: