I liked the first one a lot, and ran it with a Mark V25, which beefed up the low end pretty significantly, but yeah, its not gonna be a good comparison to a 2502 or 2902, and if you're comparing to the 2150, fucking forget about it hahaha.
The PS series is great for powering Kempers, Helix, Axe Whatever, etc. I like them best for modelers since you usually still run direct to FOH and use the PS to power your on-stage cab. I would not use one for my main gigging or recording power amp for guitars though.
This was my Kemper through my Splawn cab and Power Station V1. The profiles are of my Quick Rod shown here. Sounds legit to me.