I've done Meyer lemon via cuttings and AL, both produced beautiful results! The one I air-layered last November is now flowering abundantly! Both have grown well, but naturally the AL took off faster once detached.. My original Meyer lemon, which was grafted on to a flying dragon trifoliate rootstock however is doing poorly.. Go figure! Lol! I understand the rootstock was intended to provide more cold hardiness (as the trifoliate supposedly can tolerate down to 6a climes, but doesn't produce fruit that is very tastey at all), but in my experience so far the 2 trees on their own roots are doing much better.. So I say go for it! ;)