Everyone will have there own opinion on what's going to be best but I just run a Galaxy tablet with Gaia. I forget what model it is but 10", wifi only with expandable storage. Going with a setup like that you can download the maps of the area you will be going to and view them with no service. There are two options for map downloads, one being download along planned route, which is just like it sounds and only downloads the portion of the map your route goes through, not sure how far off the road it goes. The other is to download map tiles, which you pick the area you're going to be in and get just that piece of the map. I prefer the second and usually download a way bigger area than where I plan to go so I can look for alt. routes and other points of interest. I haven't used anything Garmin in over 20 years so not sure what they are like but with the Premium Gaia membership you get all functions of mapping and tons of map layers to choose from which is really handy. I've been running this setup for 5-7 years and have no complaints. Also with the account you can have it on all your devices and access it from a laptop for building routes or looking up past tracks (both can be done from a tablet but easier on a computer) Most people already have a tablet that is capable of doing this so it's one less thing to spend money on that only gets used on trips. Plus side is you'll have your tablet for books, music, movies or what ever else you have downloaded. I have a Ram X mount for mine in my Jeep that holds it pretty secure just above the factory stereo. Pretty sure there is a free version of Gaia so you could always download the app and play with it a bit to see if you even like it. I just went back and reread your question and I guess my response isn't really an answer to what you asked but I already typed it so I'm hitting "post reply" .....No, I have no experience using the Garmin and don't know if it's worth the investment. I have no idea what the Garmin costs but since you said it was an investment you might give this setup a shot before dropping coin on something new. If you like it you can always upgrade the tablet you're using and then you have a new tab for home and in the rig