I just picked up a lightly used Tower Sofa, and couldn't be happier. I've been watching the usual channels for a deal on nice condition high quality leather sofa for a long time, and finally found one that met all the criteria that my wife and I had laid out.
The Tower sits wonderfully for my wife (5'9") and I (6'0"), and appears to have the ultra down cores in both the back and seat. I would rank it's comfort pretty close to the Austin series, albeit not quite so 'enveloping'. One nice feature is the tall-ish curved arms that fit your back nicely when turned sideways and leaning against them. They have vertical tufts (not sure just what to call them) that give just the right balance of cushion and support. This sofa is on one side of our home theater, and so sitting on one end and facing the other will be a common use for us. When facing forward, the arm height is perfect for placing your upper arm on top (at least for a person in our height range) and leaning into it. Overall, I would say that this is one of the more comfortable H&M sofas I have sat on.
The Antelope leather has a rich look and feel to it. It is a touch shinier and slicker feeling than the cream of the aniline lot, but it is still miles better than the leathers you see on most store displays (The Keeping Room excepted). The Saddle color is dark, but it's highlights are just light enough to let you know that it's something special.
This one is about a year old, but still fills the room with that wonderful smell of fine leather. And the cushions don't really show any signs of settling or puddling, even with the ultra-down cores. I am not sure just how much I would have paid for a brand new Tower Sofa in Grade 3, but I'm pretty sure it would be nearly double the $1950 I negotiated to bring this practically new beauty home.