Has anyone been on a storm chasing tour? Looking for recommendations on the tour companies.

There are so many companies online, I'm having a hard time knowing which ones are honest/legit/best for the $buck. I've never met/talked to anyone who actually went on a 'nader chasin' tour.
Preferably one that leaves from Oklahoma City - since that fits in with the rest of my holiday itinerary.

Did you find there were many "down times" where there was no storm activity at all? That would be a huge disappointment after paying for the trip. That is one of my concerns as well.

Any thoughts?