I've shot them. Nice bows. Shoot like other high end hybrids. Bow length should be determined by your draw length, not the weight of the bow. I'd recommend 62-64 inches for a 28-inch draw. Couple inches less for a 27-inch draw, couple inches more for a 29-inch draw and so forth. My recommendations lean toward the long side. Others might prefer shorter. Definitely something to discuss with the bowyer. These are rather expensive bows. You don't want to make a mistake if you can help it.
The riser is shaped a little different than most other longbows. It's dished, like many, but it's quite thin in the grip area side to side. You may or may not like this feature. I'm sure the bowyer can make it thicker as well, but the standard version is quite thin. good luck.