Story: Starts off revolving around a NEET gamer which becomes really good at what he does as a NEET. Later he gets abducted and sent to an island to fight other people, a pretty decent story line enough to grab your attention.
Art: Looked pretty clean so it's good enough to watch to keep yourself entertained for a bit.
Sound: It sounded like what you'd expect/hear from playing an FPS with grenades and that type of stuff so it's good enough to pass.
Character: Similar to what you'd find in an average anime, white knight protagonist gets beat down stands back up. Gets a few allies along the way, nothing special.
Enjoyment: This part may seem very biased and is entirely my opinion but the anime was good all the way up to until the end , I couldn't believe it that one episode could ruin the entire anime. Mr. Protagonist is trying to be a good guy and he gets beat down (best example I could think of without spoiling the entire anime.) This made it very hard for me to enjoy the rest of the anime thinking how cliche it was , and it not only happens once but twice and totally ruined it for me.
Overall: I recommend watching it ONLY if you're prepared for cliche scenes that are almost cringe worthy and if you're okay with the risk of getting cancer near the end.