Just cruising by, but I'll offer this as an anecdote...
Thirty years ago or so, when I was working lineservice during high school on the weekend at our local airport, my boss came to me and asked if I wanted to sit right seat in the Citation for a day. What? Who, me? SURE!!!
It turned out they couldn't get a hold of their normal standby pilot. It was a Citation I, (CE-500, certified for single-pilot operations), they didn't need me, but it would've kept the insurance people, (and pax), happy.
The standby pilot eventually showed up, (this was waaay before cellphones), and they left without me. I was crushed.
That is what off-the-cuff pt.135 is like.

So, would you have taken my time seriously? (I didn't even have a license yet, it might have been "dual given".)
How hard up is OO HR in filling classes? That's the question.
My take? It'd be great exposure and experience, but if you're just there to satisfy their insurer, well...