As a person who read the (web) manga afterwards, I feel like it's my duty to criticize a few points in this anime. While it is one of my all time favorites, and the adaptation is impeccable, I have a few points to make.
[THERE MIGHT BE SPOILERS FOR THE WEB MANGA but they were supposed to be in the anime so they're pretty minor]
STORY - 9/10
It was enjoyable. Yes, it focused more on LE PLOT, but meh, it was still pretty funny. They adapted the web comic pretty well and actually added its own fun nuances and references, like the bit that mimics and parodies JJBA. One thing I'm not pleased with is the fact that the anime cut out an entire part that should have been present in episodes 24-26. I'll get to that in the character part.
ART - 8/10
From what I know, the budget here was sliiiiiightly lower, but it's still good. It's colorful like the original, I wish it wasn't so saturated, because it was a bit much at times. It fit though, so I'm not complaining.
CHARACTER - 8/10
The characters are a delight. I'd give this a full ten if they didn't cut out two characters. One's not so important but the other one IS, and it sucks. If they're ever planning on adapting volume 2, they're going to have to go back and animate that part. [SLIGHT SPOILERS AHEAD, VAGUE BUT MIGHT WANT TO SKIP THE REST OF THIS PARAGRAPH]
I'm talking about Neun (more commonly spelled as Noin bc of fan error) September and August. The latter, as I said, isn't as important but Neun takes center stage in the very beginning of volume 2. His introduction, I'd say, is FAIRLY IMPORTANT. This is also a very biased part of the review, lol. He's my favorite, so I'm pretty butthurt.
Enjoyment - 10/10
Overall, Senyuu may be short, but it's worth every second. It's a well adapted anime that is hilarious and easily recognizable, and it's fun to read the source material afterwards. Definitely recommend.