They're just about as good as it can get. They really did their homework on what material to use, how to heat treat it, what they could make bigger, etc. Price wise, they're expensive, but given that a full set of CTM's 300M shafts will run $3K, the superior shafts at about $2100 are a bargain. You may not have the absolute last edge in strength that a CTM 300M shaft has but they're still extremely strong. They're probably 90% as strong for 2/3rds the price.
One problem with any alloy shaft setup is choosing a ujoint, and what it comes down to is that it's not smart to use anything but a CTM in a set of axles that cost several hundred dollars each. That adds considerably to the cost of the assemblies but then the ujoint is a pretty important link in the chain.
I think in the D44 shafts, Superior beats warn out, but we have to give warn some credit here, they build a pretty good shaft for a pretty decent price and have been doing it for the last 5 years. Superior has a smarter heat treating procedure, smarter profiling on the shafts and nice beef on the ears. Rolled splines never hurts either.
One more thing I like about Superior is that they're a big well established forging company that does all their own work in house, here in the country. They're really accountable for their work and don't rely on the warranty to bail them out of poor quality control. We've found that full warranties don't help much when you break down on the trail somewhere.
