Gave this a shot and it looks very promising. I had no issues setting it up and getting it connected. At this point, without a lot of changes to my system setup, though, I can't actually use it without "allow other" functionality (I have several accounts that will need access). Obviously, this is the first release and its more functional than most tools out there so I have to say I'm pleasantly impressed. It scanned and cataloged my 3 TB drive in a couple minutes. Subsequent mounts were near-instantly ready.
One other "nice to have" would be to easily use it with multiple accounts (say, two Google drives with different credentials). I think that you can do this now pointing it to different configuration paths.