Hi September18,
I changed to 3 back in April as my husband joined them and they were doing a great deal at the time (free phone). I'm on the lower package and I get 100 anytime mins included plus have a few add-ons. Never had a bill so far above €35 p/m (was paying €60-€70 for the same with previous network) and the coverage is very good. Main reason I changed is that for an extra €3 or €4 p/m I have unlimited calls to any 3 network numbers. On higher tariffs they include free calls to any 3 network numbers. I kept my old number.
Only thing is they are not as flexible as say Vodafone would be. Otherwise so far great value for money. Husband is on 400 minute option and he is saving a fortune in comparison to his previous provider.
best advice is to shop around and see what deals are out there at the moment that suit you both. as previous poster said each will have good deals for calls to their own network.