Took me around 42 hours to play it till the end (including all the downloadable content (new character Zaed, Normandy crash site etc.).
A great story of course - Nicely told - Nice characters etc.
BUT (for me) the biggest disappointment - there is nothng to drive.
I want my Mako back
Scanning Planets gets really boring after a while and why the hell did I scanned almost 70 % of them if there are not enough things (weapons etc.) to upgrade. Still got from almost everything (Platinum, Palladium etc. 200.000) but nothing left to buy, to upgrade or to explore.
The story really got me and I wanted to know how it ends (couldn't stop playing it.) but the universe map with all these planets suggests that there would be much more (at least more little sidequests) then there really are.
At least I had lots of fun playing it and it was worth waiting for.
Hopefuly ME3 will again have something to drive in it, everything else would be sad.