I have one of the yellow Garmin things as well, it does the job. Pain in the bum entering the co-ordinates though.
Since getting it, husband has upgraded his phone, and what I like about the app is it will show you nearby caches wherever you are.
For example, last week we were in another county for a family do at a pub we'd never been to before, fire up the app and find a cache just up the road, so left the aunties chatting over coffee and snuck out to get it!
Essie I remain unconvinced on the premium membership as there are very few premium caches near me, maybe when I've run out of all the others....which will take a while!
We went to do one today, am trying to mop up local ones that we haven't got to before.
I agree with previous posters, I don't like the magnetic nanos stuck on the back of a road sign, you end up looking very suspicious.
Do you remember this news story?
www.bbc.co.uk/news/uk-england-leeds-14039229
Because we go with the boys, who are 5 and 7, I like caches to be where I'd expect - you know the obvious hole in a tree sort of thing, because they get very disappointed and sometimes more than a little cross if I've dragged them out in Weather and then we don't even find the cache.