I've just done two of them and no problems, except they wouldn't let me check in online - it didn't say so, just said 'not available at this time', so I wasted a lot of time trying again and again when in fact it's never available on this particular trip.
I wouldn't bother paying extra for speedy boarding - sometimes all it means is you get on the bus first, not the plane.
Incidentally, flip flop, when it said the gates closed sharp at 3pm... actually it hadn't even opened by 3pm. And they did wait for latecomers. I don't mind either way, but I wish they'd stick to their word.
Hardly anyone checked in luggage, so that sped things up. No weight limit (within reason) on carry-on bags.