Feb 2018 update: 2017 15 inch Macbook pro with touch bar. Flexiglass continues to crash with certain applications (it will always crash with microsoft one note when I try to realign the window). Certain applications do not dock with flexiglass. I've been using flexiglass for about 3 weeks now (i used the version prior to this one) and have been using this latest version for the past 3 days. So far, no problems whatsoever. I'm using this on my macbook air and the app runs seamlessly. Flexiglass has worked with all my programs so far (ms office, chrome, iTunes, spottify, adobe reader specifically on a day to day basis). The only thing I can complain about is that, when trying to dock the windows (side by side or on corners) theres a half second lag where the window highlights what its going to do (ex: dock in a corner) before it actually docks itself. This lag is only apparent when you use a touch pad such as the one on my air. When using a mouse, the lag goes away and the windows instantly dock. Overall, I love this app. I came from windows 7 and i loved docking my windows because I often times read one file and type onto another simultaneously. This app brings that functionality over to lion (i have no idea why it isn't native), it was the one thing that I thought windows 7 had over lion. But now I can't complain about my mac anymore = ) Update: There is no more window docking lag in version 1.5!!! Still have not had any problems with this app.