Fredrick,
I have a pair of Orvis Pro Guide waders. This is my third season using them and they have served me well. I looked at the Tailwaters when I was buying them, but got the Pro Guides at half price during an Orvis sale. The Pro Guides also fit me better.
My experience has been that the wading boots nearly always out-last the stocking foot waders. Since the boots are attached, you must buy a complete new pair of waders, at close to $400, when they wear out. With stockingfoot waders, they can be replaced, and your still have the wading boots.
Also, I use my wading boots for wet wading in the summer. Bootfoots would eliminate that option.
I have not heard of an probelm with Tailwater waders. Orvis' top of the line waders are quality products, and Orvis has great customer service. If you like the boots attached for convenience, and they fit well and are comfortable, then go for it.