I do a year long release for my kids, my parents (both mine and in-laws) and my spouse. So far no problems except with Getty. Getty still make me do a unique MR for each shoot, and it's a bit of a pain, especially as they are hit and miss on even accepting an Easy Release MR (even though they state it's approved by them). But, really, it's not really that much work to make a new one each time if you're using an app that pre-fills all the info in.