There are a bunch of different ones out there and just like steel, you really need to get fit to know which ones work best with your swing. My last two sets have been Tensei Red but Aerotech Steelfiber have a big following and many LPGA users.

I switched to Steelfiber i95s in my T200s earlier this season, after testing them out in a friend's set (actually on the course from various lies, using different irons). His were i80s, which seemed a bit light to me in the short irons. My new i95s are the first graphite shafts I've ever played in irons. I was looking to lighten the stress on my shoulders and elbows. These helped immensely and added a few extra yards, too. Big bonus! So far, have no complaints with them.

For my next set of irons (probably a T100S/T200 combo set), I will try the i95s vs the i80s before placing my order. May split the set with both i95s in the shorter irons and i80s in the longer. We'll see what the testing shows.

The Aerotech Steelfibers play a tad stiff....which personally, I like. If you are looking for something a bit smoother, Recoils are also a good graphite option. MMTs and Tenseis, too. And there are quite a few others. Don't just pick one. Try them all first if you get the opportunity.

Going to a good fitter would be my first step to see if you really need graphite shafts. My fitter and I had this discussion a few years ago and he determined that steel was still the way to go for me. Am 75 and can still control the ball with the lightweight steel. Me thinks working with the experts is the only way to go. =)

I have the Steelfiber shafts in 90 and 115 gram weights in two sets of T100s. They play as stiff at Dynamic steel. But there is so much variability in graphite shafts you simply have to try them. I also have a set in the 80 gram weight and will pick up a set of T100s and reshaft this winter. You have to see the ball flight with any trial of graphite shafts.

I play the Graphite Design Tour AD shafts in my sets. They are not cheap but they are the smoothest shafts I've ever played. I have also played the Tensei Red shafts. They are my next favorite.

I play GD-AD Tour shafts in my woods and U500 4 iron. I would have to agree with you. Considered them for the rest of my irons too, but went with Aerotech Steelfiber i95s. No complaints at all with the Steelfibers, but when I put a great swing on my U500, it feels fantastic. That may be partly due to the head, but it is also definitely due to the GD AD shaft.

Currently playing Project X5.0 on my combo set p-7 620 MB; 5-6 620 CB; very interested in trying graphite. Not getting younger (60), Hit 8 iron 150 yards. Not really looking for added distance, just to take some of stress of elbow and shoulders.

I have Tensei Blue R shafts on my 2019 T200 and T300 irons, with the same shaft on my two Vokey SM8 wedges. The Blue shafts added a bit of weight (over the Red) and still provide the elbow, arm and shoulder stress relief.