I've played PoE a bunch since the early beta. I've played probably 15 characters through merciless, always retiring them when they finish the storyline in the early 60's. PoE is an amazing game, which I've always recommended to friends highly based on my experiences.
For the release, me and a friend made new characters again and played them through the story, but this time we kept going with maps. Doing so has really brought the game down some in my eyes. We ran something like 30 maps over the past few days, and through all that, we found nothing worth mentioning. Lots of rares, one level 16 unique, but no meaningful upgrades. Both of us are still wearing the gear we had in our 50s, even though we're level 72. Both of us only have 4 links, no 5 or 6 even after using up all the currency earned while leveling.