I was given a pair of Graf Edmonton Specials, because a charity I was associated with received them as a donation. I guess they were of a size and stiffness that none of the people the charity served could use, so they were a fair number of years old.
One of the heels fell apart after a few months of use. I started looking online, and found that was a problem many people had reported.
Basically, the heels were created out of many layers of leather glued together, possibly with a base layer of wood.
I called Graf. They told me the boots were defective, or that I had screwed the blades on incorrectly. I wanted to replicate their glue to put it back together - but not only was the glue toxic and carcinogenic, but it had to be set in a high temperature controlled oven. Not the sort of thing you do at home.
I considered using Shoe Goo, but Graf wasn't willing to give any advice on it. I don't know if it is strong enough.
Graf reluctantly suggested I could bolt the heel together. (I guess I would have had to drill an indentation inside the boot, or the insole, so the the of the bolt wouldn't press against my foot.) I never got around to doing this, but found someone online who said they had done it, and that it had worked.
(Edmonton Specials are designed for quads. Way more than I needed - I was mostly doing Ice Dance.)
So you have one bad review from me. However, if other people are happy with them, that is good.
I will say that the Graf Blades, which I didn't use, seem to have a potential problem, last I looked. I think the mounting holes were NOT countersunk - which might make it difficult to accurately position the blades on the boot, and might make the mounting position unstable. But that isn't from experience, just a guess from a non-expert.