The best thing about the ProTec cases is the price. I look at it this way: If I get 3 - 5 years out of my Trumpet/Flugel combo case and then I have to replace it, (I'll most likely get much more out of that case since I've already used it for almost a year and it's still in great shape) It isn't like I'm going to be spending the same kind of money for it as I would for a Reunion Blues all leather tripple bag.
Lets see, the ProTec combo case - $96.75
(
http://www.abimusic.com/cgi-local/So...html?E+scstore)
or the Reunion Blues Leather Tripple - $277 or Nylon $169
(
http://www.music123.com/Item/?itemno=75564)
The ProTec costs less, holds more and protects more in my opinion.