Had mine about 6 months now and love it. I also pay £20 a month with three for which i get unlimited internet access and unlimited texts (STFU). I use google maps which is an excellent app when used with GPS. I can normally connect to at least 4 satellites.
I must admit i don't use it for emails as such as it is a personal phone and i tend to check my hotmail account using internet access rather than push but when i did set it up it seemed to work well.
I'd recommend the phone, and for what i pay per month, can't really fault it. One piece of advice, buy a gel cover asap to prevent the aluminium scratching if you go ahead and purchase the phone.