It's fast-paced and well-planned, plus it's got a lot of creativity in all the zany ideas for bugs and plot-lines they explore. Within the first few chapters alone they go through entire short stories of plot so well that it would be difficult not to get hooked, though afterwards it does start to meander a bit and while the plot does kind of advance a little, they're almost at the same place doing the same as before by my up-to-date latest ch 15.
This isn't really seinen, this is about as shonen as they come for kids in school investigating wacky mysteries with all the comedic relief you can bear.
The humor is not always present, often hit-or-miss, but sometimes decent, similar to Mob Psycho in many ways. Most of the side characters are repetitive 1-note unfunny gags: toupee advisor/teacher, delinquent/bully students, shy girl who may or may not ever do anything...
The art is really detailed and usually quite good, but while the world(s) are creative, the art for it is not particularly imaginative or artistic, often limited to plain/straightforward depictions aside from some mediocre exaggerated reaction faces. The artist doesn't really take advantage of the medium to do any interesting paneling, depth, cinematography, or anything like that, it's a very plain rendition of the story.
The main characters are fine, their personalities are distinct, straightforward and unoffensive, though a bit bland.
8/10 (where 5/10 is average)
