For the record, Bob Clouser and Lefty Kreh both recommend stripping baskets. You will find Clouser's thoughts on pages 116 and 125 of his book Fly Fishing for Smallmouth. On page 116 he recommmends them for distance casting. The discussion on page 125 is more generic. He points out the value of a basket for controling slack both in a boat and while wading. To find out what Lefty sez, I Googled "Lefty Kreh stripping basket." Lefty endorses stripping baskets almost to a fault. He favors those that hang on the angler's side instead of the beer vendor model that started this discussion. Of course, since most of Lefty's endorsements are made in a salt water context, we could say that salt water fly fishing is so different from fresh water fly fishing that the recommendation does not apply. That would be absurd.
When I first started fly fishing, I wore a geeky kreel which I abandoned long ago. Now that side mount stripping basket might fill the place of the kreel. That geekiness, to me, is the basket's only shortcoming-a minor one at that. What Clouser and Kreh say, however, is not going to affect my opinion on the basket. It already has the recommendation of several experienced ISA anglers right in this thread with one notable exception.