I had Zümo 660 and SMH 10 before and more often than not had a problem with the mono sound coming into Sena from Zümo. After some trying I learned that i had to have Zumo on first and then turn on Sena and if lucky, I got the stereo connection. I also had another problem with 660, i.e. it was a bit slow, often I missed a turn because it showed it too late, especially on roundabouts. And then the screen was difficult to see in sunshine.
So finally got enough with those problems and upgraded to Zümo 595LM, Sena 20 S and Iphone 7 combo. On my last 2 weeks trip I had a chance to try it in many ways and I must say I am pretty happy with everything it does. The connection with Sena is always stereo, I can use the Garmin smartlink app within iphone and get info to Zumo screen about traffic problems, weather, incoming messages and many more.
One isse though, that troubled me with the Zumo 595. We were riding in Germany and I decided to use the Adventurous Routs option. First it took quite some time to calculate the route. And then, while navigating, after a while it simply restarted itself. And did it many times in a row. I was completely confused. Finallly found out that I had picked too long trip, ca 400 km or so and it looks like this was too much for its processor so it simply went crazy. After I shortened the trip to some 150 km, everything worked perfectly. Have any of you experienced the same?
I have both full Europe map and also some MP3 music on its own internal memory. Could that cause the perfomance problem?