It might seem fun in the beginning, but it becomes stale and ripetitive pretty soon, the whole game is reduced to just grinding (in the most boring way possible) and hoping for the servers to not crash, in case they crash, hoping they realized the error is on their side and they don't give you any penalty.
There are plenty of MS, true, there are a lot of custom parts, true, but to be at least a minimum competitive you must stick to a very reduced subset of MSs and focus only on defense, which utterly kills the only strength the game has, the variety of Mechas.
It also has massive time-distortion issues...I was literally in front of the bomb I just placed in the enemy base and then it was defused...the enemy did not see me, because I was still alive and they passed literally through me.
They should pay the players, it is not even worth it for free.