i tried roblox once quite recently,
i found it to be horrible
it was constantly laggy
it always put you in third person as default
you couldnt lay down bricks, you had to duplicate bricks that were already there
it was almost impossible to build in-game
the whole "free" thing is just an advertisement for the membership clubs that you have to make a monthly payment for
you couldnt jet (which i find to be quite necessary if you are going to build)
after all this, i wont play it
and now blockland:
random missing brick textures
rand streaks across the screen
both of the above is enough to cause me to not want to try to play it anymore