I've got it pretty good in my right ear. I have noticed that it is not nearly as loud when I am diving.
I used to have trouble sleeping because of the ringing. Then I bought a white noise machine. The best money I have ever spent. If you have trouble sleeping for any reason, I would urge you to try it. It takes a little getting used to, but it's well worth it. You can even download white noise CDs or MP3's for a cheaper alternative, or to try it before you buy it.
Mine has all sorts of settings from just raw white noise, to ocean waves, to thunder storms. I am amazed at how much better I sleep now.
I am not sure if it will help every one with tinnitus, but it helped mask mine, so that I can get a good night sleep.
Good luck to every one out there!