I was def against it ,but got a unicon system now or 2/3 years yes it's great ,but has its issues ,price of rings for one , batteries , codes during race season , spoke with a top tip fancier a few weeks back about ets, and how t makes us lazy re ring numbers , when writing out a race sheet colour sex. You get to know each pigeon. And on return from race you mark it's number down again , but with ets most haven't a clue a what birds what ,unless they win of course .