Here is some of the popular complains about them.
- poor support
- problem with shitcoins deposit and withdrawals
- wallet maintenance (w/o prior notice)
If you intend to contact with the support and you have problem with your wallet it will take you forever before you received a reply from them.
Experience one problem then it would really takes time for it to get resolved yet yobit do get the title to have the worst support ever into an exchange which mean they don't tend to reply if they do then it would really takes ages.One thing I do like with them is that they are still persistent,even facing issues they do still strive to resolved. If you do like to trade then use it with your own risk as long you are already aware on the possible situation that you might faced.