There is definitely a reason some of us are using silpoly in shelters, and it isn't based on cost savings (there isn't any). I just wrote and published an article on this subject that goes deep on the topic if you want to geek out. As others have noted, silpoly is not weaker, and the data bear...
I love my FF bag. I'd say they are every bit as good as WM. I wouldn't question it for a minute. I've been using them for a few years and have been very impressed.
It definitely depends on your trekking pole length, but it can be pitched with a single trekker. 54" pitch is how it would pitch if it was elevated quite a bit, but for example I have a set that are 55" tall on their tallest setting. Hope that helps.
I was going to point you to the product pages where we have it all listed out, but @FlyingDutchman did the math for me below. If you do want to see the weight breakdown, we did try to get all of the weights listed out so there is complete transparency about weights for just the tent, tent w/...