To be fair we have always used monarch ZB service and found them to be excellent , maybe a little bit more more expensive but they some how seem to be a cut way above the rest, at the end of the day you pay your money and takes your choice , if cost is a overiding concern perhaps jet 2 is the way , however if you want excellent customer service and wish to fly in modern well maintained aeroplanes perhaps its worth the extra few bob to go with monarch.
Having said that we found the jet2 cabin crew be excellent , its a pity they have to work with such old tired aeroplanes.