If you take a look at my setup below you can see my system pretty much sucks except for the video card. But i've been buying parts for a computer i am going to build myself when i get the time, and one of the parts i ordered was the CUSL2. I have heard very few bad things about the mobo in the forums, and as far as professional reviews go, i havent haerd any bad things. AnandTech has reviewed probably close to 100 mobos, and i've taken a look at most of them...i have yet to come across a review that gets a higher rating than the CUSL2. i especially like the fact that its the only i815E board that can run all three DIMMs @ PC133 cas2 without sacrificing stability. now i would never need to use all three DIMMs, but the above fact only makes me feel that it will be even more stable b/c i'm not going to be pushing the board to its very limits.
remember, i'm in the same boat as you...i got the board b/c of all the outstanding things i've heard about it...i havent actually used it yet.
if you are interested in Intel's new chipset, the i815EP, ASUS is now producing the CUSL2-C, which uses this new chipset. it is almost exactly the same as the i815E, but without onboard video (which nobody uses anyway) and supposedly supports up to 1.5 GB of SDRAM (unlike the CULS2's limit of 512 MB of SDRAM). in fact, you dont have to wait to get it anymore...there is a post somewhere in AnandTech's forums thats says a place in NY is selling the new board...