<Impression>
this game consists of japanese animation, "Sword Art Online", main character and their companion who are customized by yourself (they have several kinds of character voices in Japanese), customizing outfits' and weapon's color, lively battle alongside the characters of SAO, and contents for hardcore players to replay. (Story? No, I don't know it.) My impression of this game is that this game isn't TPS but J-RPG where people mainly use guns in stead of swords.

The difficulty of this game is easy among TPS games, because my aiming is very bad but I can stably clear the most difficult hardcore quest in Co-op, thanks to assist system of Target Assist when you aim down sight. Most enemies' attack motions are large swings, so you don't need to often input commands quickly to avoid them. Also, you will be fine if we enhance our character and equipment and know about enemies since this game is not only TPS but also RPG.

Also, this game is rare game which realize a boy's dream, "Slash bullets with a sword". "duel wield guns" is also a man's dream, isn't it?

You should be careful when you use swords in this world of guns, but if your attack hit enemies apparently, there is no way to happen "miss" since this game's genre is TPS and there are no hit rate nor avoidance rate. I personally prefer this point comparing to other SAO games where people mainly use melee weapons.

By the way, I play this game with keyboard and mouse but my left hand is pretty busy because it need to operate most of commands with keyboard except for aiming and shooting. Thanks to two additional buttons which work as "go ahead" and "back" on my mouse, it's not too busy in my case, but if you use a simple mouse, your hand may end up being too busy.

<Game Contents>
You don't have to enhance your equipment but only need to update new weapons to finish the main story. However, if your purpose is only finishing the story of this game, it's better to play other SAO games.

Most of contents of this game are available in only offline mode except for farming a few kinds of weapons which called Type-Z weapons that you can mainly farm in the hardest hardcore Co-op. So, I can't recommend this game to people who don't like playing and enhancing gears steadily, but if you like it, please be careful not to play too long time.
Regarding gathering materials for enhancing, it will finally be solved by too much money. By the way, there are alternative ways to get Type-Z weapons and there are also alternative weapons for them. So, it is not true that we need to join online contents in this game. these points let you play this game later without hindrance.

About paid DLCs, you should get No.2 and No.4 of paid DLCs in order to comfortably play endgame content, and need to get all of paid DLCs to enhance your weapons completely. So, it's good to buy Complete Edition from the first. Weapons in base game are similar to each of their peers in most cases, but additional weapons on DLCs often have sharp characteristics and they will let you have fun more.