I have the CF baggage in mine.
I too bought it from Todd. It is a Landis product, so the quality is awesome. The install is probably one of the easiest things you will do on your plane. The fwd rivets go in holes in the fwd bulkhead that are already there
Everything (all two pieces

) is rivnuted for super quick and easy in and out. The way it is self supporting is rather ingeneous, but it too has flex, and you will hear familiar 'cracks' if you get to heavy handed with it... I would strongly recommend 1/4" closed cell foam for the baggage area, and loading it yourself. Because any dent in the baggage will be a dent on your fuselage
I don't know of any that a truly 'flat floored' in a 180 and this is no different.... There will be about a 3/4" lip going into the baggage, and worse yet, the baggage kinda runs uphill going aft, from the rest of the floor.... None of this is all that bad, and with some thought to what you put on the floor, you will even be able to sleep in it. I have quite a bit...
Given the weight, or lack of, this is one of the best things going for a 180.... I honestly don't think it weighs the full 5 lbs...
Mine prolly does, because I put a full length hat shelf down it. Using the formers down the skin. This gives me a place to store gear when I am sleeping in it, and splits the load so the CF floor isn't carrying everything.
As far as W&B goes, if you take 2 sleeping bags, pads, pillows and a tent that area will be half full and no where near a dent in the W&B.... Leaving your normal baggage area for heavier things, or things that you may want more handier. This baggage is a no brainer in my opinion.
I think it's a bargain over the competitor, given the weight savings...
Take care, Rob