my aim be to get a gp with no map capability in order to maintain good habit when navigate with visual checkpoint . the low battery consumption be also a important matter . the Brunton unit I get from Finalcall fulfil all my expectation . the very large screen , additional feature such as the compass , the altimeter or the barometer in addition to a full GPS unit be perfect . I will use it mainly when make cross-country travel in a Cessna 172 as a complementary tool to classical navigation instrument . the service give by Finalcall have be perfect .