Using Gamma Seals on Fermentor buckets

[backdeckbrewery]

I just bought a couple 7 gallon buckets and gamma seals from usplastics.com and was wondering if other people were using the gamma seals and how you liked them... I plan to drill a hole in the top of the lid to put a stopper and airlock on it. I read an article in BYO about these and thought it was a cool idea. Let me know what you think.