I don't see them as being any worse mor superior compared to ezy. Here both ULCCs. They both have a basic service. The onboard experience is almost identical. And MON charge you for using online check in (ie they make you choose a seat at £6.50). With easyJet it is free and straight into my iphone ready to go. It's never that easy with MON. Legroom ain't great on either, nut at least with EZY I'm not subjected to the pleather seating. Cabin crew good and bad with both. But one event sticks out with MON. I'll fly them if they're the cheapest as they don't have a USP to attract me and that's your problem. People see the MON/U2/FR product as the same and they'll buy a ticket on the cheapest flight. MON does not have the cost base of U2/FR and that is another problem. Their fares will always need to be higher than the others to generate a profit.
Good luck to all at MON. It can't be a nice experience to go through.