Is busticket4.me reliable?

I want to buy a bus ticket (from Belgrade to Podgorica) online at https://busticket4.me/. However, I wonder if this site is reliable (maybe it's just a scam, maybe they will take my money and will not sell me a ticket).
Does anybody have any experience with them? Has anybody succeeded to buy a ticket from them?
Best Answer
I have been in Montenegro recently. This is what I have seen on Podgorica main bus station:
As we see, the screen with a schedule of buses just displays a busticket4.me website. And there is an ad and a logo of busticket4.me there. Which suggests it is not just a scam.
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