It's a really really underrated anime, and I really hope that someday somehow, it'll get the attention it deserves.
It was entirely unpredictable and really got those brain gears churning, but not in a headache sort of way.
There was a perfect amount of comedy written well into it, the villains had realistic retaliations, but at the same time not exactly realistic considering that even though the solutions to the problems in every episode are realistic, there are things like bubble gum that blows up big enough for you to use it like a balloon, a talking dog, a woman that can shapeshift into a cat, and a cat that eats treasure.
Not to mention, the intro is pretty catchy too.