Seen it, never dove it. Simple is a relative term. The Oxycheq Ultra Lite Travel Backplate weighs 9.6 oz/272 grams without straps and can be found for $44.00.
Fair enough - I certainly won't disagree with you there. I was primarily responding to the idea that the Infinity package was significantly more "gimmicky" or complicated than a typical plate/wing/harness setup in common usage. My primary reference point is divers in the Monterey, CA area - which I can certainly appreciate is more than a bit different than no-suit warm water vacation diving, especially when traveling with gear.