I used OnX in Wyoming while mule deer hunting. It worked very well.
However, there were a few things that were somewhat annoying.
1. It defaults to cell coverage every time I pull it up, even it is just in sleep mode, so long as cell coverage was available. This is somewhat frustrating because it eventually ate up my data quota and I'm paying extra for exceeding that limit this month. I'd like it to go offline and stay there until I call it back.
2. I had added a number of polygons for my own reference. Now, every time I touched the screen inside of one of them I get the polygon information and I can't do whatever it was that I wanted to do (usually draw a line to measure distance between two locations). I finally had to turn off each particular polygon that was giving me problems, but now I had no polygon reference on the map that I wanted to use. I would like to turn off the pop-up feature w/o turning of the polygon itself. And doing that is a hassle in the field anyway, if I have made a lot of annotations on the maps.
3. One area we hunted had a BNSF rail line down the middle of it. All on BLM land according to the map. However, I talked with a rail line inspector that was driving on the tracks in his truck and he told me I was on private property. He did not run me off, but I felt like he was doing my a special favor, not that he couldn't have rung me up for trespassing. I'm not sure what the rules are out west on BLM railroad, but they would isolate a hell of a lot of country if they are not legally crossable.
Overall, I would say that the OnX system was only about 1000 times better than a Garmin GPS. A few minor tweeks and it could be 1003 times better.
Oh yeah, I would like to buy two states and not 50 states, 48 of which are useless to me.
Brent