i just bought a lifetime sub too - been waiting for it for a while, saw the offer for the US customers but it wasn't clear if the same offer was going to be made to the EU customers, glad it is.
re the game itself - it's certainly not perfect. i'm no lover of the lore, story or anything else, however you can't help but be immersed in it. the game looks really good, runs well and generally has a really good community. the thing i really like about it is there always seems to be something to do - rep, deeds, crafting, questing, raiding, instances or if i get bored i go and grind rep with the mrs in real life.
re the servers, people are on every server on these boards, personally I'm on Snowbourne in United Kingdoms. the radiance grind is a bit of a pain, however it is now much easier to get the stuff. it's changed to coins from specific drops for armour pieces, that means you can just do 2 or 3 instances rather than all of them (some are a real pain).
it's well worth the offer.