I reviewed some TiAXs... not bad, they had a solid turn that was reminiscent of Indy, not as quick as Thunders, but they were good.
One thing they need to do is at least put a little dimple at the base of the kingpin to help secure the bottom bushing. I never had problems with the ones I tried, but I've seen a few sets where the bushing gets warped and funky. They don't even need to make a full on cup, but something to at least catch the little ringed part of the bushing connected to the plate.