Advantages and Disadvantages of this game?

Eh? your quest is vague.

Like does it take a LONG time to lvl up in this game?
How is PvP
Guilds
Game Play
Items

can lvl fast if you in party
at times stated on site is 2-3-4-5 times exp hour/hours
guilds good for partys
game play nice
items easy to get.

Long grind at higher levels, lower levels are basically easy. Repetitive since it's a Korean grindfest.
One of the best PvPs in a mmorpg (in my opinion)
Guilds are cool if you find a decent one, meet a lot of cool people, help you level, etc.
Game play is alright, pvp is sick but favourited at the moment
Items are expensive as fuck if you want good ones and they are kind of repeatitive at the moment since like everybody has basically the same shit in looks.

I also heard there was lag problems in large towns due to alot of shops / spam botters?

spam wont cause lag. shops will cause temporary lag, but it vanishes when your server finishes downloading all the shops around, tho you can avoid this by joining any other server except kalibus if you are in trieste.

one disadvantage would be an extremely high lvl of bots on diferent maps or zones, wich it would cause mobs to lag and the lvling somewhat difficult, this does not happen everywhere so that doesnt affect gameplay that much, it just gets somewhat annoying to watch a bot take over your kill but then again you can alwayz avoid this.

overall its a good beta test still some bugs but nothing big