I'm waiting for a trade to settle before I buy this game in a couple days, but I'd like to chime in with my opinion on the eLicense from past SC2 games.
I don't care for them at all.
I build my own computers, and from time to time they meltdown. Unfortunately, when I've installed a game with eLicense on that box, that copy is lost forever. So if I want to play on my laptop and another desktop box, I need to keep de-initializing and re-initializing as I switch back and forth. Not an enjoyable experience in the least.
I tried to go through the customer service process to get my second code freed up for a new box, but got no reply after multiple attempts. Frustrating.
It won't keep me from buying more SC2 games, but it certainly does dampen my enjoyment of the series.