Slippery customer. I set the tasks indistinctly - I left a link to a bunch of material, not wanting to specify the tasks and subjects. Then he suddenly remembered that he still needed work. As a result, he filed for arbitration for delays and the order was not paid for the delay. At the same time, they received the work. I don't recommend getting in touch.
A good, good and adequate customer.
No problems with the resolution of operational questions and payment.
They get out of contact quickly.
From the shortcomings: the task was not quite clearly placed, it had to be clarified a few times, but it was decided literally in the counted hours.
In general, you can work. I recommend it.