I tried many extensions before. Neither of them could satisfy me needs. However, HikaShop appeared to be very easy, simple extension with lots of functions! It takes time to study it, like any other e-commerce extension, but after you spend some time with their forum, you can easily adjust it as much as you need.
Separately, I would like to thank the team of HikaShop for their excellent and fast support.
I recommend this extension to everyone!