Mr Elop has ensured that Nokia + microsoft can't be a winning combination, both 2011Q4 and 2012Q1the N9 outsold all Lumia models together, during the year with Mr Elop as CEO, Nokia has fallen down from the marker leading company to something larger than RIM.
Draw backs with the Lumia is that they don't have all the features as Symbian, the Lumia phones can't have any exciting hardware as a 42MP camera (takes microsoft over a year to write the driver for that camera according to microsoft), the Lumia is far more expensive to manufacture than the Symbian or MeeGo cellphones as you need to pay microsoft US$20 for each unit (both Symbian and MeeGo was under Nokias control). The first models of Lumia was not made by Nokia, only branded, so those cost even more to manufacture and they were of poor quality. The Lumia phones can't be upgraded to WP8 according to microsoft, so they will have a short life before they are EOL. Resellers don't like to sell Lumia, as there been too much issues with the phones and the margin is too low, they make a better sell by selling an Android based phone. Nokia has alienated two of the worlds largest operators by trying to force WP based phones which can't be customized as well as Symbian or MeeGo and on which those two operators already had spent loads of money on. Don't forget that most operators dislike the fact that microsoft is the owner of Skype and Skype is offering cheaper call prices than the operators and those the operators are speding money on blocking the usage of Skype and other VOIP options. Don't forget that there even was a bribing try by microsoft by throwing in a Xbox if you bought an Lumia phone, that didn't go well as the N9 managed to beat the Lumia with 3 sold units for each sold Lumia unit and don't forget that Lumia has been advertised a lot, the N9 has hardly had more than a few excellent reviews and mouth to mouth advertisement.
The whole deal with microsoft has cost Nokia a market share loss from 32% to 7%, for microsoft it has been a status quo where the WP share has been staying on 2.4% (this number includes cellphones from not just Nokia, but Samsung, LG and others who has WP models for sale).
Of course there are people who like their WP phones, as there are those who love their iOS phones, but for Nokia the package of Mr Elop and microsoft has been the worst ever package they could have, it's now a lot worse for Nokia than it was after the crises with the Nokia TVs.