I have Oxycheq Signature Mach V 40lb for 3 years. I like it a lot. Like everyone mentioned, it is tough shell, very thick bladder, low profile, streamline in water. The good things we all know. The "don't likes" will probably be what OP wants to know. So here is it:
1. very stiff shell material. Much stiffer than H and DSS, which I also have experience with. It makes packing for traveling more difficult.
2. noticeable heavier than H and DSS at similar lift. Again, bad for travel
3. bladder is cut very big compare to the shell, it gets folded quite a bit inside the shell. H isn't like this. I can't examine DSS, so I don't know there.
With that say, if I have do it over again, I will still buy this wing especially for the money. As for comparison with the H eclipse wing, I will have chance to dive it a few more time. I will report what I find when I think I get to know enough about it