I have an ancient cathode ray Koden radar which is still excellent so using that as a guide for longevity and ease of use, I bought a Koden (Si-tex) plotter and depth sounder and despite them working as advertised I curse them every time I turn the buggers on. They also have the most ridiculously useless manuals (they are also falling apart, now a pile of loosely-gathered sheets of incomprehensible paper) that I also curse every time I open them.
If you want a plotter, get an iPad, I use one as a back-up with Navionics and its way better than this new plotter and its replaced Standard Horizon. Oops, you don't want a plotter...
I still like my ancient radar.