I've read that some here have had more than their fair share of problems with Lowrance. I hate that.
I have one of the new HD 5 units with lake insite. Admittedly I too had a minor glitch or two with the HD unit. After talking with others, and reading up on my unit, I found that I needed to perform an update to install the latest version software. Version 20.30.50 or somthing along that line.
After the update, my unit performed brillantly. I absolutely love it and the features are remarkable. Nothing on the market that I found can touch the mapping. After I added the chip, it became an even better unit.

I hear the side scanning is coming out soon. Yes, the 600.00 dollars is kinda steep which will prevent me from obtaining it anytime soon. I'll give it some thought and make a decision about it later in the year.

Again, I had difficulties before the update.... After the update I have not.
I absolutely love it, and would choose it again.
Just a different perspective.