I ordered the WTX3 and was dissapointed when I found out it was backordered. I ordered an Oxycheq wing, the Mach V 30 lb, from Peter Sotis at Addhelium.com. The WTX3 wound up coming in about 2 weeks after I received the Oxycheq wing, so I was able to compare the two side by side. I am so glad I did not end up with the WTX3. The build quality on the Oxycheq is sooooo much better, the WTX3 is huge compared to the Oxycheq, and the kicker for me is that all the parts, including the bladder, are replaceable on the Oxycheq. On the Oxycheq wing there is a zipper that allows you to fully view and inspect the bladder of the wing, the WTX3 does not. Compared to other wings, the Oxycheq was priced right also.