So Blizzard have been getting stick about the connection problems and having to be online. Other than a bit of lag - which in all honesty is a bit of a joke for a single player game - I've had no issues with connection at all.
It's a fun game and pretty much what was expected. A little stream lined with having no skill tree's like the originals. You learn moves for each "slot" (left click/right click and 1-4) as you level up which can be customised by runes which are again unlocked as you level. Simple or stream lined, I guess they are the same. It makes it very smooth though and you can try different things quite easily.
I've tried all the classes for a couple of levels except for Mage. My main is a monk who I've got to level 18. I played a Demon Hunter to level 9 and the others I have just fooled around on for literally half an hour. They're all pretty different which is good, the Witch Doctor is a bit of a pain but i imagine that class will get silly powerful once a few skills have been unlocked and some gear found.
It's worth noting as well that your gold level is constant across your account, rather than your character. Same goes for things like levelling the blacksmith. I like how that works, it makes life easier making new characters and will help reduce the grind a bit.
I'm sure co-op will be good but at the moment, as the Social Pane keeps reminding me "You have no friends". Which is very blunt

One thing with the retail copy is I have two access cards that have a key code that will allow you to play for free up to the first boss - the Skeleton king. If anyone fancies a bash then let me know and I'll sort the code with you.