Anyone have any experience with varivape tanks?

[xXSPOONEEXx]

I'm wanting a new tank that won't crack and looking into phiniac but they're kinda sold out of everything lol. anyone tried the varivape tanks? they look awesome but they also look like they would spill juice easily, or leak if the carto dont fit right...I'm unsure about them.

 

[xXSPOONEEXx]

eh sold out too, guess I'll have to keep looking, anyone have experience with these regardless?