I am going to upgrade my Lowrance LMS 334 this spring. I am looking at 1197 Hummingbird. Or one of the New Lowrance unit. My question is. Is it really going to be worth spending the time to relearn the Hummingbird SI and will it be usefull or should I stick to what I am very familure with and stay with Lowrance. I am still going to keep the Lowrance that I have (334 unit) and put it up front by my trolling motor. I have been using the GPS and trolling baits on ledges I also drift the mud flats. Other than that I will anchor up in the spring and fish 0-5 foot till after the spawn. I am most insterested in posts from people that have used both that know how use them and from owners of the Hummingbird SI and problems they have had. Thanks for your replys.