I have the lowrance I-finder H2O and like it alot becuase I fish out of others boats quite a bit... for navigaition purposes it works well but a little hard to see in the bright sun, you need to have it pluged in the whole time or the batteries will go down in a days time. If I was only going to have it in my boat i would go with a combo, my next purchase will be the humminbird 797 with the side imaging....