I almost flew with them…..
Tried to fly out of Manchester with them on the day the snows hit and shut everything in January. I rang up a few days before to confirm you couldn't book the bike in advance (which you can't) but they did put a note next to my booking to forewarn that a bike was being taken. At the airport they booked it in with no hassle and didn't actually charge the £28. Then the airport shut and 12 hours later the flight finally got cancelled…..
They were also no hassle with the refund (but it took a week to get through – volume of calls from 1000s of cancelled flights meant you just got number unobtainable rather than holding in a queue so not a major pain I guess).
Just book it, arrive early / smile / be friendly at the airport.