With two lenses, the adapter works really well. I had two objectives in advance of an alpha 55. The focusing is to my Alpha 7 at about the same speed and the same well. Also measurements on small middle point works great. Aperture and shutter speed are taken as usual. Manual focus also makes no problems. I would not expect so.
Under the adapter is a threaded connection for a tripod. This camera is considerably relieved when using a tripod with heavy lenses. Of course, the camera is no longer so beautifully small and handy in this combination.
I had the adapter actually purchased only as a temporary solution, because there is no macro and telephoto lenses with full-size and E-mount for Alpha 7. But I'll probably keep it longer - at macro and telephoto use it does not bother me, because the lenses are large and heavy anyway.
I can the adapter for all the already A-Mount lenses have full frame, recommend and writing this review, because I have found themselves before buying very little information about this adapter.
Although Pure APS lenses work well (either reduced to APS or as a round figure), but the adapter but not worth it. Then be better to wait for e-mout lenses or as an interim solution an APS - Buy E-mount lens (which you get with under for the same price as the adapter).
PS The LA-EA4 I bought my alpha7 directly from Sony, as it was the time of purchase is not available here.