That being said, if you make false statements about gear then please expect those with experience with that gear to correct you. Sorry if that upsets you. Its the best part about our forums: BS gets corrected.
Yet BS about DIR persists with surprising regularity.
Here are a dozen reasons why the ET is not DIR. Comments are based on watching a
16 minute assembly video and examining the
product literature.
I've tried to focus on the ET, not the ET Deluxe, since that appears to be a more expensive and less minimalistic system.
-Comes with a fabric backplate and no option to replace with a metal one. For cold-water diving, this is a real issue (have to put lots of weight in integrated pockets which is awkward and leads to non-ideal weight distribution, no option for a channel weight)
-Webbing in multiple pieces
-Non-standard: team has to carry multiple spares
-Seems to require an awful lot of fiddling/pushing with a screwdriver just to get the thing assembled.
-Plastic screws to link wing to plate
-From the pictures it's hard to tell how much elasticization of the wing there is. The Deluxe ET clearly has some, but the plastic-clipped bungee running to the outer, bottom, inside corner may be a problem as well--or may not.
-I don't see a reasonable wing for small doubles on Zeagle's website ("optional bladders"). By reasonable I mean a non-bungeed, non-funny-shaped, non-dual-bladder horseshoe or donut wing.
Can be replaced at some price in time/effort:
-No crotch strap by default
-Long oral inflate hose
-Seems to come with velcro oral inflate hose retainer by default
-Plastic D-rings, triglides, and harness buckle
-And finally, if you're going to dive something 90% like a BP/W, why not just dive a BP/W?
N.B. I would be more than happy to dive with anyone diving an ET, and I think it's a perfectly reasonable gear choice. But the OP said he was headed down a DIR path, and neither of the two DIR-exclusive organizations will train you in this setup (UTD would teach Essentials in it, just like they would teach it to anyone in a back-inflate BCD--but to continue on he would have to buy a BP/W). You're doing a severe disservice here by leading him down the path of having to buy gear twice to do the diving he wants to do.