I played ~30hrs with mouse and keyboard and i got around.
Then i bought a x55 HOTAS and i am some happy video gamer now.
I loved playing the game with mouse and keyboard, too but would never, never ever go back to keyboard and mouse. I don't know if it's my smaller hands or inability in general but i found some combinations of input you need to fly hard and sometimes not possible. With my HOTAS setup it felt more natural and feasable.
Just flipping the switches, even if it's only for cargo scoop or landing gear is much more immersive and fun for me.
I love my x55 as it serves me fine and didn't have any problems until now.
I played with HOTAS for some hundreds of hours and don't regret any penny spent on it. I even saved some money because i never bothered playing another game until now ;-) (ok, 13hrs of witcher, then i had to come back to ED)
I can not really recommend the X55 though because i didn't try any other setup, except the sidewinder for Xwing/ Tie fighter a long while ago and it is not cheap, compared to the budget ones.
That's only my experience, some people seem to differ and that's a good thing
Cmdr Lassan