I had fun reading the posts. I just bought my HT-S5300 this past Saturday at BrandsMart USA, and let me tell you, it really does rock !
Unfortunately, it does not come with an Audyssey mic
The volume/sound quality is really good considering it is a HTIB. The speakers have a sleek, clean look to them, and do feel sturdy. The bass module sounds really good.
I setup all 7 speakers, with only two in the back for surround (the other two I placed them on top). I did a comparsion test before/after I setup the speakers using the GUID, and I was able to tell the diference. I still need to do some fine adjustments, but over-all, I am very pleased!
This afternoon, I will be replacing all my "cheap" HDMI cables with decent ones, and will have to do more testing.
Here is some advise - read the manual first !!! I know - I usually just toss the manual to the side, and not worry about it. There is a lot of good information there, and can potentially help you avoid any issues.
I will keep you guys updated, and please, do let me know if you have any questions!