I very much regret this decision. I spent ~100 hours trying to get it to work properly and to configure Ubuntu (including supposedly simple things like switching Alt and Ctrl keys). At the hourly rate I'm charging, this is more than enough to buy ANY laptop. Next time I'll swallow my pride and just buy a top of the line Macbook Pro.
Out of the box Ubuntu works great, but it is very fragile to updating. For example, updating BIOS to a version that fixes an important CPU bug causes the computer to freeze and shutdown every few minutes at random.
Updating the OS itself caused weird bugs such as being unable to click on app menu items with a USB touchpad. Ditching the default Unity for Gnome3 fixed this particular bug.
The recovery image that Dell provides for Ubuntu simply does not work a few months after release – craps out when it's unable to either fetch or install some package. So I don't even have a way of getting a working version of Ubuntu on this laptop if anything happens to my hard drive.
Oh and the touchpad configs are appallingly bad out of the box. Impossible to use. I fixed 98% of palm interference issues with a few lines of xinput config. I don't know why Dell didn't do that themselves.
And of course, Dell only provides only 7 days of Ubuntu support. After that you're on your own.
Now I'm trying to sell this laptop, but no one on craigslist wants it even at 35% ($900CAD) off the original price. A few months old laptop in perfect condition that is still on warranty.
Speaking of Ubuntu itself, it has been a profound disappointment as well. I will not be trying Dell or linux on desktop for another 7 years at least. My 9 year old Macbook Pro is far superior to this mess.
PS I also tried hackintoshing this laptop, and it worked 95% of the way, but it requires the latest BIOS to work, and that causes random shutdowns regardless of the OS.