We just finished a cross-country trip, 4,745 miles in 22 days with our Thor Axis. What a wonderful trip through our great country. The E-450, V-10 performed beautifully, but the best thing I did before we left was install the safe-t-plus. The winds, rough roads, especially through Arizona, were made less of a problem (even one-handed steering). We breezed through the mountains and the desert. Aside from some minor "house problems" the unit performed well.