I have noticed some battery drainage from time to time. I have not experienced the black screen phone call. The biggest issue that I have incurred has been force closes on messaging application. This will randomly happen when unlocking the phone and replying using Handcent. Both my wife and I have had droids since two days after release, I am not sure what the different model series are, so if someone could shed light on that it would be great! Overall this phone has been great for us. We have owned a lot of smartphones and each one has it's quarks. Also each one will have predecessor that knocks it off it's throne, but overall the best ones are those with only small issues that are easily fixed. For instance, iPhone call quality sucks after multiple OS patches, so I do not considered it a good smartphone. The Droid functions perfectly about 97% of the time, which is solid to me. We will see on December 12th what is still pending as issues.