I did have a 798 and switched to a Lowrance system just last year, Any Bird unit is alot more user friendly than Any of the other brands out there. Depending on what your wanting to do with your sonar system, will ultimately effect whether or not you will like this unit. As far as the unit by itself, the sonar and map pages are great, i ran mine on a 2010 Navionics chip. I always split screen mine with the sonar, and would use a depth mark and some on shore points to line up my spots with, once you stop moving or are trolling slow the GPS will not be that accurate but thats with any unit. As far as the small screen, you will notice that on the scan option, go into your settings and cut the range down, i ran mine at 40ft and sometimes only on one side. At 100' or more structure is so small on the screen you cant tell what it is. The biggest issue i had was trying to link my console unit to my bow unit, its a long story but if that's something your wanting to do research all your components carefully be sure you can do it before purchasing your unit. Other brands, are about a million times easier and cheaper to link together than a bird. Honestly the unit i had that i was the happiest with was an 898, its a few hundred more expensive but definitely worth the difference, not to big not to small all the info i needed, easy to use