As with all the tech in todays world in the fishing world there are new units coming out yearly and cannot keep up myself. My early Hbird is slowly giving up and I purchased a Helix 2 yrs. ago and have yet to install it because I will probably do not want to "start over" . Just my .02 cents is to avoid ff/gps combo's, keep'um separate. There will be many yea's and nay's on that subject alone.

Gene