Just for fun and learn, I install Yukon Beta1 tools in new work station partition. I have a lot of trace from my customers. I pick one customer trace and one user, about 100 rows. I run Index Tunig Wizard SQL 2000 SP3 and finish with 0 recomendation. I print all informs that wizard give, most important indexs used. After that I run Index Tunig Wizard Yukon, and finish with 2 recomendations and 72% improve. I repeat the two steps twice. I analize recommendations, compare with availables indexs, see execution plan for some query and sound razonable to me to apply those new index, so I did it. I run ITW 2000 again, same trace, and finish with 0 recomendation, but now those new indexs are used againts others. I run the application and run faster than before. So I get 5 users more with differents traces, and in 4 I get better performance with new indexs. Is important to explain the following: ITW 2000 give me good results and works fine, in fact I have no complaint from my customers. Is not my idea to implementate what I find until final release, is just and experiment. Luis Martin Moderator SQL-Server-Performance.com The views expressed here are those of the author and no one else. There are no warranties as to the reliability or accuracy of anything presented here.