I have a Lowrance X125 on the bow of my boat that I dont use much. It works good but it went bad after about 6 months, the alarm goes off even when turned off and stays on most of the time if you turn it on. So I have to leave it unplugged or it will drain my battery from alarm going off.
I have had a lot of Lowrance though and never had any problems so not trying to scare you off this is the only one I have had problems with in the Lowrance line up.
Good luck with your purchase it should work nice for you.