Needing to replace my Garmin GPS as Garmin 'Customer (NON) Service' refuse to replace the battery. So, specifically I am looking for a relatively simple item: hopefully not Garmin (the firmware upgrades caused way too many hours of frustration and incompatibility issues with Microsoft) but obviously Suunto, Tom Tom etc. Preferences include: item doesn't have too many readouts which are based on computerised guess work (Estimated Calories Burnt et al) but DOES have a screen readout which I can see Cumulative Height Gain during a run. Suggestions please and any comments about your user-experiences of any models gratefully accepted.