The helix did not replace the Onix. Onix was the top of the line with Helix being the less expensive model with less features.. Solix replaced Onix last year. Do not know about Lowrance but the Humminbird models are easy to operate and the owners manual is built in the software so you can pull it up while on the water. They update the manual when they update software. Humming bird also keeps giving free updates to their products. My Onix does almost every thing a Solix does with the updates. Humminbird has already let me know they will have a new update for my unit at the end of January .If you want to link and troll the Solix is the way to go. The Ulterra motor is great with spot lock, following contour, repeating a trolling track and the stow and deploy is awesome.