I used Muun all along, prior, during and after the high fee event, and personally didn't experienced much of an issue, mostly due to the fact that I only make relatively large transfers from Muun to Belo periodically, and use Belo for daily micro-transactions. A BIG plus in the case of Belo is that it always subsidizes transfer fees, so I didn't lost anything all along (up to today). Muun fees have decreased substantially yet have not come back to what they used to be, but are still low enough for relatively large transfers (100 USD here is a "large transfer", and fees are 1 USD for those -returned later by Belo-).