345triangle: Did you get the A-mount adapter yet? I finally tracked one down and bought it.
I found that using MF focus is a lot easier than on a DSLR, even when not using the MF-focus help (which gives you a 100% crop).
Like with the rest of the camera its built to very high quality, the lenses snap in very tightly and securely, no play/wiggle at all. The adapter comes with a add-on which lets out mount the whole thing to a tripod, its probably a good idea to use this tripod mount instead of the one used on the camera, because of the added weight with the A-lenses.
So far I have tested my Tamron 90mm 2.8 macro, Samyang 85mm 1.4 and the Sony 50mm 1.4.. All with great results.
Samyang is a all manual lens, but with the others the camera can control the aperture when your taking pictures.