DH and I installed Hardie panel, with Hardie Trim in 2010. We bought the factory finished panels that did not require painting, and used their colour matched caulk. Nice is that the trim around the windows looks just like wood. It blends with the other 1980's cedar siding (painted) homes around us.
After 5 years, we needed to paint it. The factory colour (green) was fading, but the caulk colours weren't.
Otherwise, it holds up great. It is very heavy to install, creates the "bad" dust, is hell on blades. I recommend the hardie plank horizontal siding. That is easier to install. If you have a partner, it is not an especially difficult skill. This was my first job using the air nailer, for example.