I think that it isn't a bad idea if placed behind the back plate, where you're less likely to have trauma from rounds impacting. On the downside, it is placed in a location where it is going to be laid on while in prone or leaned on while sitting. Also, usage of a battle belt may hamper quicker deployment.
At $150 a piece, it's kind of hard to say if it's more beneficiary to a normal style IFAK, like an ITS Fat Boy in the blow out pouch.
Edited by mangeface, 07 January 2014 - 11:06 PM.