Has anyone used Flixbus in the UK to go to an airport? They are about 1/3 price of National Express (£28 return instead of £95+) for the dates and times that I need to go but I've never heard of them before.
I've looked for online reviews but the majority seem to be for their service abroad.
It just seems a bit too good to be true so I was hoping to get some genuine feedback on here.