I'm a very happy Xps 13 9343 (2015) developer edition user and think of buying a new one.
For some reason dell does not offer the developer edition in europe even though it's being sold in the US for about a year.
I tried all offical ways I found to contact someone at dell and even resellers to get any information on this.
I also contacted @DellCares on Twitter, but did not get a response.
Since it seems like there are always people who know stuff on HN:
Why is it that I can't buy a Dell Xps 13 Developer Edition in Europe?
All the best, Martin
Suspend is still not properly supported (no deep sleep) but that might be the case with the developer edition as well from what I have read, and Dell does not seem to care. That is the main downside for me.
Overall, I can't say that I've been very happy with its performances so far, and the lack of USB-A compared to your version is a real pain. I guess this would be the same have I had been able to purchase a developer edition.