Some are reporting problems but I have had no issues with 10.7.2 on my MBP or my wife's MB, on Hackintosh 10.7.2 works great but you will need an updated Chameleon boot patched to work with iCloud and FaceTime.
Having no issues with iOS on our iPhone 4 and iPad, iCould works but really needs some improvement, I am not sure I am liking the photo stream yet as you cannot delete just one photo from it.