I have 34um67 , so far I love it . a lot of space on screen !
First time you play a game on it you'll feel weird due to more pereferal space. Games look gorgeous especially fps games and sims like arma 3 and dayz sa.
Some games like skyrim and fallout will require some tweaking since they don't support 21:9 field of view, to solve these problems go to flawlesswidescreen.org and download the program.
I believe that this is "29um67-p" and of my own experience that 29" inch is smaller than regular 16:9 24" Monitor , I'd go for 34um67-p which is 34" and Msrp just 50-100$ more.