You could start with the Wall of Shame on my Blog (
Adventures of Tanglewood). There is lots of detail on the issues I encountered, none of which have been fixed by Simrad/Navico as of this date.
After 6 months of working with Simrad trying to resolve the issues, several of which I classified as "don't go to sea until resolved", none were fixed and there was no clear path to get any of them fixed. So I removed all the Simrad equipment and returned it to them. It's now exactly a year later, none of the problems have been fixed, so I've very happy with my decision to dump them and move on the products worthy of marine use.
I'm happy to tell more, but pretty much all the details are in the blog (I think). If you have a little fishing skiff, know very little about navigation and what to expect of nav equipment, and are happy with the robustness of products like Windows, then it will probably serve you just fine. Otherwise run, don't walk.