We purchased a Rand Mcnally 7720 this past March just after we switched from a 5th wheel to our current RV, a 2010 Pleasureway Excel and have been extremely satisfied. We have put about 8,000 miles on it and it has worked without flaw. Since I have a built in GPS in my silverado we were used to operating them but the 7720 has so many features for Rvers it was a no brainer when we compared it to other units. We have added the sun visor, screen cover and suction mount and all have worked well and enhanced the ease of use. Although we did not purchase it from CW, they do have a few units set up for your examination and comparison in store. We did a lot of research and are very happy with our decision.