1. Plus - it can work easily and consistently.
2. Minus - you need to be technically oriented for it to work easily and consistently.
3. Minus - you have to use two separate apps, which dont sync together, to take advantage of the full potential of the Mio Fuze.
Point 1 & 2 - Out of the box, the Mio Fuze was 3 generations behind the Apple Mio Go app. Every time I tried to run the app, the sync failed. I ended up disconnecting the Fuze connection in the app, fully closing the app (double tap home button on iphone & upward swipe the Mio Go app to fully close), doing a soft reset on the phone, reopening the Mio app, reconnecting to the Fuze, and trying to re-sync. After the 3rd try of the process, the Mio Go finally updated the Fuze. Since then, it easily and consistently syncs.
Point 3 - Normally you would expect the features of Mio Go and the PAI app to be one app. I can only assume one was purchased from a different company and then they tried to sell it as one product. Unfortunately they dont sync together. You can sync the Mio Fuze to either app (Mio Go or PAI) but not both. Once you sync your Fuze, the data is removed from the Fuze so you have no data to sync to the other app. Again, the apps dont sync to each other. They claim that feature is coming. They should not have released the product without that in place. They offer a clunky way to get the data on both apps, but its not easy and requires you have your phone close to the Mio Fuze while youre working out. In a nutshell, you have to stream your workout into one app while working out, then close the app at the end of your workout, open the other app and sync it. They also recommend that you dont do it that way with the Fuze. So I havent tested to see if it even works for the Mio Fuze.
Shame on them for rushing to release a product before its ready.