One of the best values out there.
Back in 2013 I had one of the first-runs of the PF-500. I believe there was an overall problem in the design or a component and mine died after just a few uses. Ampeg replaced fixed it with a new board and it was great - it also seemed to eliminate the problem of "cutting out" which many users were complaining about. If the amp was driven hard the signal would completely cut out and Ampeg claimed it was by design and to back off of the gain or ultra-low. After the visit to authorized service that never happened again and the amp was great sounding and solid. At 500 watts it had enough power for about any situation. Sadly, that amp was lost in a flood at storage unit where I kept some gear.
A couple of years went by using some configurations of other gear I had, and then I was ready to replace the PF-500. After looking at EVERYTHING out there ( I kinda wanted to try something different for fun ), I found myself back to the Porta-flex series but the 800 watt version. Who wouldn't want 300 more watts? This is a solid head, great construction, sounds amazing, not feather-light but that makes it feel not as much like a toy. I use a TC Electronic Spectra-Comp but the compressor onboard will do in a pinch - though not my fav, but way better than none. Oh, and if you find the right laptop bag ( briefcase/clamshell style ), this will fit in there like it's made for it. Also, all of the patching options are here - which many of the small class-d's have to omit due to lack of real estate.