I've been using tattler lids for couple of years now. Failure rate is about the same as with the disposable tin lids both right after processing and later after storage- one or two every now and then. I don't can much meat except for stock but do a ton of everything else. I have noticed that failures are usually due to a minuscule nick it the jar rim, an improperly fitting ring or not leaving the correct head space and having spillover. I have found though that washing the jars after they have sealed helps a lot especially if there was a spill. I just rinse well under very warm water unless there is grease or something sticky then I may add a bit of soap and rinse well. The vinegar idea is probably doing essentially the same thing- removing any debris in which bacteria could get a hold on and grow.
I did have a few more failures when I first started using them mainly due to trying to figure out how tight to put the ring on but they did a post once on how to get it just right and I haven't had problems since. The trick is to put the filled jar on a smooth surface put the lid on and start the ring then without touching the jar or lid tighten the ring with just your finger tips until the jar starts to turn.as soon as the jar moves stop turning and process. After processing tighten the ring all the way.
If you are interested in trying the tattler lids wait for specials. They usually have them around different holidays. Sign up for their mail list or like their facebook page to get notices.You may also find them at True Value and Do it Best stores soon too. I found out recently that their is someone at university of Georgia using them for a research project on canning and preserving food so that should result in some interesting results. And they recently put out another blurb that their is someone else that has 'copied' their product and may start marketing it soon.