I have the Lowrance M68, which is both a GPS and fishfinder. It works great and have had it for 3 years with no problems at all. The unit on the left is the Lowrance X0G, which is even better. It's a combo auto GPS and a marine GPS. I bought the map chip for the Midwest and it contains all the depths for 1,000s of local lakes. It is very accurate and saved me a couple of times from running into a sandbar or other shallow areas. Since I can use if for driving directions, it's a unit I can use all year round. The only downside is the size of the screen. It's a little small and sometimes a little hard to read when underway going fast and bouncing around. But, at slow speeds, it's no problem at all to follow.
I didn't want to drill any mounting holes in my boat's hull, so I mounted the skimmer/transducer unit on the M68 to a suction GPS mount. I had to do a little trimming of the bracket to get it to fit just right, but as you can see, it worked well and saved drilling holes into the transom and/or having to leave the unit with the boat when I sold it. It held great and only fell off one-time while underway. I tied a lanyard on just in case.
