Hi,
Yes, we are using it in our environment, but only on servers where we have a problem.... We found that there is a overhead on performance if you leave it running on a instance. Also great for "non-Dba" users to look at, and get to the problem fast! Nice auditing functions, and monitors the OS to a degree..
Overall, i think for the price you pay, this is a must have in your toolkit! (Saved me alot of time already!)
Eric.
Eric Rautenbach