Yeah, impressions from the likes of Anandtech and MKBHD don't seem to be mentioning any crippling issues.
I had a huge issue with the preview release. My Nexus 5 kept rebooting every 10 seconds or so and there was nothing I could do to stop it. Might have been due to the fact I was playing around with Tasker and root that caused it. I had to go back to KitKat. I'll give the next build a shot, hopefully it's out soon. This time I won't install any hardcore root apps until I know they're working properly under L.