Hi Mcar33,
I ride with a Mio Cyclo 505 GPS unit not a Garmin so I can’t comment on compatibility etc, however the Cyclo is Bluetooth enabled but I’ve never tried to pair it with the bike. I’ll give it a go and see what happens. I have also used the Emotion app as a bike computer and it's okay and does provide some useful post ride information, but I both prefer the Cylco and like to keep my phone safe in my rack pack rather than exposed on the bars. In terms of connecting other ‘tech’ I’ve got a real mix ‘n’ match, but none of it interferes with anything else or the bike/phone connectivity.
My phone, (a Galaxy S5) is connected to the bike via the Emoition app, my Fitbit, the Cyclo and a Tickr Heart Rate Monitor. Oh, and if I can be bothered, a Fly6 CE back light/camera and a Tomtom Bandit. In turn the Cylo is connected to the same heart rate monitor, a wireless but magnetically triggered Mio Magnetic Cadence & Speed Sensor, and of course back to the phone. Some are connected Ant+, some are Bluetooth and the Bandit is local Wifi if I can ever get it to connect. Not unsurprisingly when the phone is connected to most/all the phone battery drains faster than sieve with extra-large holes!
I have also used Emotion app in ‘Auto’ mode that varies the power assistance level depending on your heart rate. I tried it a couple of times but I didn’t like it. Where I live doesn’t have many long climbs, but plenty of short sharp ones and the app being reactive waits until you’re heart rate goes up and your huffing & puffing half way up the hill before the assistance kicks in; it then continues to give you maximum assistance after you’ve gone over the top. It also seemed to use the higher power setting more often than I do, thus giving less range. In practice I prefer the manual, simple and pre-emptive pressing of the power button.
As a matter of interest, what capacity battery are Orbea specifying for the US model? If they are just reprogramming the controller to give you up to 20mph of assistance but still using the same 36V/6.9A battery then surely this will draw more power from the battery and hence reduce the range. Just curious.