I have been using Wise
I have been using Wise, and before them Transferwise, for some time now. I only do simple international transfers but I find Wise simpler, cheaper and quicker than if I did the transfers through my bank. I also get the exchange rate that I see on XE.com which is not what I get from the bank. I have never had a problem with them.

I can't think of any reason to stop using them.