Ever the tinkerers, Lezyne spent much of the last product cycle fiddling with its GPS designs, and not even the "simple" Mini GPS Bike Computer was left untouched. We set simple off in quotation marks because the Mini GPS is small, but its colossal data collection and route management abilities are rarely duplicated--even in much larger and more expensive models. And despite its Brobdignagian breadth of function, the Mini GPS remains one of the--yes--simplest, most intuitive GPS and training metric interfaces we've used. The biggest change between model years is the advent of Bluetooth compatibility, which was previously only enjoyed by its decidedly non-mini stablemates like the Super and Power GPS models. This update makes the Mini GPS a full-fledged head unit, giving it wireless access to power meters, heartrate monitors, and any other ancillary device that speaks Bluetooth. It also means that, though there may be GPS units or wired speed and cadence computers that are lighter than it is, the Mini GPS is virtually unchallenged as a GPS head unit--especially considering that anything that comes close to this level of functionality will likely cost much more. With Bluetooth comes the link to the ever-present smartphone, and the Mini GPS takes advantage by using Lezyne's Ally app in order to provide the kind of smart services that let us turn off our own head units and shuttle all the blood to our legs. With Lezyne Ally you can enable live tracking for anyone who wants to follow your ride, get live segment alerts from Strava, translate ride maps into turn-by-turn prompts, and sync with third party sites like Strava (of course) and TrainingPeaks. It also displays text and call notifications, but--to be perfectly honest--we'd typically rather just focus on the road. The new Mini GPS's less pronounced additions include a "return" button, which helps to navigate the Mini GPS's expanded menus and functions, and one addition by subtraction bears mentioning: the Mini GPS l