I have the anti-vibe mount on the bike with the weatherproof charging head so I'm good to go.
I bought the rain hood for the iPhone SE but it turns out the phone is waterproof. I also bought the screen mount and charging head ordinaire for the car. It doesn't need the anti-vibe mount. I'm not sure the bike does either to be honest. There is a problem but it is more about off road bikes. And then, just to be sure, I bought a second hand iPhone SE to use exclusively on the bike and in the car, no SIM to keep things simple.
I've had a few 'interesting' journeys using MRA nav. Asked it to take me to Halesowen in the car to get it serviced and it all looked so good. It kept telling me to turn round but I figured that was because it was taking me via the M50 and I was going into Malvern to call in at B&Q. However, when I caught some traffic and took a look at the display MRA was trying to take me to somewhere 1300km away in Holland; well, MRA is a Dutch outfit...
I did a reset at B&Q and it worked fine until I got to the dealers when it kindly informed me that I reached my destination. Well, sort of, except it was on the other side of a dual-carriageway with no pass-through. At that point the screen stopped scrolling and I drove on right off the top of the phone...
Then, on the way home it kept telling me to leave at every junction on the motorway and back to the dealers before eventually relenting and taking me home. Two blue lines on the M/way ahead, one going round the roundabout and back and the other going straight on.
I also asked it to take me to a foodie night at a local brewery on a hop farm about 8 miles away down some truly wibbly bits. I had been there with a neighbour as a passenger in his car so 'sort' of knew the way but wanted to see what the nav did. Well, it knew a shortcut missing out the local village and I'm lucky the suspension is still attached to the car. It did say 'Not suitable for HGV's' but the A3 hardly counts as big...I measured it when I came home and it was 10 metres shorter but I reckon it takes about a week longer
There is currently no route selection facility in MRA nav, only avoidances, so you can't choose shortest or fastest, neither of which I ever want to use. 99% of the time I am either following a pre-plotted route or I want it to take me the obvious way, but neither Garmin nor TomTom have an 'Obvious' button.
The new version of the MRA nav is in Beta testing at the moment and although I'm on the tester list I just haven't had time to get involved.
As far as finding destinations etc. in a search, it is every bit as good as the Garmin XT so I'm hoping the real version will be as good.