About a week ago I got an XXL from Ruby at a cost of only $119 including courier postage to UK and I have to say I am VERY pleased with it.
The case, face, hand, crown and display back are all excellent in that the quality, fit and finish are first class and to my eye are very accurate.
The visible movement is also beautifuly finished although I am not sure if it is "Swiss" or "Asian copy" ETA. In the week that I have had it it has
gained only 2 secs a day. That is COSC standard, I think.
I can't answer you question about the crystal except to say that mine has no AR. The brown croco-leather strap is pretty good as is the clever deployment clasp. I had the gen. on my wrist in an AD very recently and I have to say that the rep. gives very little away to it in build quality and general feel. I also have three gen. Omegas (a Speedmaster Professional Mk111, a Seamaster 30 and a Seamaster Deville) and the XXL does not feel out of place beside
them.
I have spotted two flaws. The stap finish is very shiny whereas the genuine croco-leather is quite matte and also the rep. has brown stitching, not the correct white. The movement is engraved "OMEGA 2201 Swiss Made" but the engraving is out of position. I think that both of these flaws are minor and if you really wanted to go to town an Omega strap is $70 from an AD and probably less on ebay. As you probably know the watch is huge at 49mm diameter but I like big watches and this one looks terrific on the wrist. I had always wanted an XXl but couldn't justify the AD cost and so was very pleased to find this rep. with help from this forum and others. Like you, I wondered just how good it could be at the price but I have to say that in my opinion it is up there with the other "super reps.".
At that price what have you got to lose!
By way of a cautionarytale, before I found this forum with it's excellent advice I bought an XXL rep. from a site called "amatorybiz.com" and got royaly ripped off.
The copy is inaccurate with wrong subdial position courtesy of the "rubbish" Asian auto movement visible through the wrong back engraved "Speedmaster Professional Micheal Schumacher". It also came on the wrong type of stainless bracelet which fitted very badly to the case and was engraved "Seamaster Professional". For this badly made toy I paid $230.
I think the XXL is undeservedly overlooked on the rep. forums. The original is a fine looking classic Omega and the rep. more than does justice to it.
So forget your Submariners, your Panerais and your Planet Oceans and treat yourself to an XXl. I don't think you will regret it. On the contrary I think, like me, you will be delighted with the best rep. bargain out there.