My experiences have all been positive...
AAR: InSights Training Center: General Defensive Handgun
AAR: Langdon Tactical Technology: Two-Day Advanced Tactical Handgun
Tactical Defense Institute (TDI) Pistol II & III After Action Review
AAR: Suarez Intl. Point Shooting Progressions - April 21-22 w/ Roger Phillips and Greg Nichols
I've also been to TDI's Partner Tactics Course, the write up on that is still pending.
I can't say enough good things about TDI, makes me want to move closer to Ohio.
We'll be going back to TDI this year for their ECQ Course.
Suarez Intl will be bringing Advanced PSP back to Iowa this year and I hope to take that as well.