I have it and it saved me several times. I keep the switch on 1&2 while cruising and switch to one side or the other while sitting. Originally I wasn't plugging the boat in at the trickle charger and I was doing a lot of night swimming with cup lights, accent lights, swim platform lights, and stereo all going. I thought cruising around would be enough to charge it but apparently I was sitting more than cruising. The boat would start ok but if I hit the trim button while cruising the engine would shut down. I had to change my swim trunks after that. The dealer said my battery had drained down too low, and the trim was too big of a drain while cruising. Sure enough switching to the other side fixed it and I now plug in after use.Just ordered a 2275 GCW . Any opinions on the dual battery system? Thinking of adding it.