The website is pretty easy to navigate. After you're logged in, click game start. It'll install a couple activex controls. After those are installed it'll direct you to the client download page. Click the download link and you will get a pop-up. Click "확인" and you will get the installer. Like many installers before it, you can change the folder if you really want or just hit "젼송시작" and let it do its thing. After it downloads 100% that button will change, and you can press it again to install. Once it's finished installing you might want to delete the setup file. This isn't done automatically and it's around 1.1 GB.
The menu is fairly simple and not much needs to be touched. I went to the options and maxed the resolution. Again on my laptop with max resolution the game ran and looked great. I didn't get any slow-ups except when I was taking my fraps video. The inventory/store button is the same. One useful choice is the game type sort/filter. This one presents a drop-down menu that lets you pick the game type and sorts based on that. Very handy for finding a specific type of game. All my photos and videos are from deathmatch. The cards are some kind of buyable/reward object. I haven't completely figured them out. I have 2, they look like weapons, but I can't find them in the store.
The store/inventory is fairly normal, except it also lets you choose which four mechs you want to take on a mission. You have many choices but you can only have four at a time in your bay. To swap them just select one that isn't in the bay and double click it and it'll be moved to the bay slot. From there you can buy new weapons, choose which ones you want to take, etc. There are a lot of choices here and you could probably spend quite some time setting mechs up. I might get into that later. I swapped out a couple mechs after a match or two just to try them and jumped into some games.
Gameplay is standard FPS fair. Move. Shoot. Die. No headshots though..so that was nice. The repair mech is also the turret builder, so you get a two for one deal here. There is a sniper mech, also a mech who can immobilize and turn into a giant cannon with a shield, and many other interesting abilities and guns. I quite liked this one, and I expect to play it quite a bit more. Currently its in open beta, so there is a chance some things might change.