It looks better than average.
Is it as good as a Eaton Power-Sure 800 or a PS audio power plant or a Furman Ref or SurgeX/ZeroSurge series-mode product?
Well no, but it looks better than a home depot stripbar or entry-level UPS, and some of the TrippLite models I've see, that's for sure...
It has your typical series LC low pass filter chokes, and disconnect relays, ferrite choke, plus a large bank of parallel MOV's.
and all of this, appears to be before the rest of the sensitive circuitry, which is good to see.
It's a strong C+
You got lucky, there is a lot WORSE ones out there...