The Hoyt limbs RAWK. By far the best split limb system out there. But Kevin is right, it's basically just a money saver for most comapnies. They are more trouble than they are worth on most bows.
Hoyt however, has done it right by re-designing and refining the system over the years. the XT limbs are touted as having one of if not the lowest failure rate % in the industry. Don't know if thats true, but would not surprise me in the least..they are incredibly well built.
As for the risers..they do a real good job of shock reduction, but as they have become lighter over the years, they do not reduce recoil nearly as well as they used to. They also tend to produce a bow that rolls back a little too easy and requires more stabilizer weight out front..something you don't have to have with one of those "popular B or M" bows
Unfortunately as they have lightened them up over the years they have also become more susceptible to bow press damage. The new Tri-ax pocket (or whatever it's called) is touted as so much better for a limb pocket, but IMO it's really to curb people goofing up the risers..The U-tecs and CyberTecs were particularly susceptible to this...Coincidence that the U-tec and the model that replaced the CyberTec received this upgrade?