OK, I'll try. I am super impressed with mine so far. Granted it costs a lot of money (well for me it does) so I really wanted a better sat nav than my Nuvi 765T. I looked at the 390 but it didn't have MP3 ability so that was discarded.
590 is still supported and manufactured by garmin. 660 are no longer in production but are still supported but that will end soon according to the tech I spoke to at Garmin. Not sure how he knows but he was quite certain.
Memory is big on the 590 and I can add a SD card if I want. No need yet.
Hardware is well sorted and the software updates/app development around these devices is now filtering through to the GPS devices. Just looking through the problems early adopters were moaning about, it is clear Garmin have listened and implemented the improved features and changes afterwards. So in essence, enough memory and CPU to make this future proof for a while. Many apps can be changed or added to these units from now on makes it a better device than the 660/765 nuvi range already. It feels like a smart phone versus a good old Nokia 7110 slide out WAP enabled device from the 90s
Screen scrolling is super smooth and easy.
Links to your mobile phone and gives live traffic updates –free for now. Can be set to suggest an alternative or to just take alternative if it will save significant time (I think it’s in the region of 5 minutes) which as you know is actually quite a lot of time to try and make up on a bike.
It comes attached with a USB power cable on the loom which allows you to charge devices from the Zumo (for those that haven't the power already installed).
Its super fast to start up and recalculate
curvy routes functions - and how curvy or not you want it to be
trac back feature allows reversing a route
you can select a place and ask the device to plot a round course to it.
you can select an area you want to explore on the map and it will calculate a route for you based on time or distance
or select a time / distance and it will suggest rides for you based on curvy routes settings etc
I can stream music from my phone to my zumo and hear it in my helmet via an autocomm lead
lane guidance is great
screen is clear for me so far without need for sun shade and in rain
you can select points on a map and avoid that area only. You just select 4 different interchanges to form a rectangle around said area and then it excludes that area from your routing. Great if you want to avoid say Birmingham….
I am sure there loads more I have yet to mention, but the Garmin blurb on their site doesn’t half explain what you can do with this bad boy. Have a look at the you tube collection from GPS City. They have 31 videos …some great features
https://www.youtube.com/playlist?list=PLvaHV4hle1StXLUPchCUzXfItSvtxJnIr
I am very happy with mine
You can add or remove layers of POI to be seen on the screen when riding or not, so I can select just fuel to be displayed or fuel and restaurants etc
So I am glad I paid the money now …!
