as long as your out side (not in an building) three is norm very good
3uk where i am around (Cheshire) it must be heavy used as I hardly get more then 1-2mb/s, indoors signal is iffy in a lot of places i use it (if 2-3 - bars intermittent no calls or internet,text , 3-4 + bars norm works fine), Three Need LTE now

(pref the 150mb or 300mb configuration running on the 800/900 band)