I’ve used Fiverr a few times now, and usually it was a good experience. I normally hire artists to do 3d modelling and that was good for me, I was satisfied of the work I got back.
However, I have to say this service isn’t easy for people with Panic Disorders. Between my latest order and poor customer support I managed to lose out on around 77 CAD.
The gig was not provided, except for 1 concept image that was a WIP. Fiverr told me to dispute this with the artist which I did but I haven’t heard back from them. Support would not do anything about this and the “time” came up where the gig said it was completed AND delivered which was not so I lost out on my money and received nothing in return.
So as for how Fiverr operates, it seems good but it really depends on the person I guess.