I guess I didn't express myself well, Bitvavo interface was good, clean and simple as you say. It has been a few years since I last used it but I recall my last transaction was to or from another exchange and they asked I upload to them a screenshot from the other exchange proving it is my own account. Then I had to wait too long for that approval. A bit too much for me and I emptied my account. Moreover, trades were not the best in terms of pair offers, probably due to low volumes.