Yes, I have tried both the desktop and server edition of 7.10RC.

Dell i9300 laptop - Better than the Beta release, with the Beta the ATI
X200 card failed completely; just a black screen. With the RC, the X200 is
working and the effects worked too for the first time. After running the
LiveCD for an hour or so, it compleley locked up - froze.

LUG Server install - after apt-get update, apt would no longer run due to a
fault in a library. So, system was hosed!

So, I will try the release on the 18th, but will not be in a hurry to
upgrade all my machines running Ubuntu 7.04 happily. Most likely will be
waiting about 3 months.

For my LUG server, also tried 7.04, but it just did an infinite reboot
after RAID1 install.