I have the Ikea one and love it as well,

but I also have a Fisher Price portable highchair. Has all the features of a regular chair but no legs (it straps very securely onto a dining chair if you want to). The chair pad is really easy to clean or remove if you want to wash it. I got it orignially because we had no space, but then we got a huge house and I would never have changed. I have a real climber and he was out of the straps of the Ikea chair quick smart, so the FP one suited us better for a while. It also converts to a booster seat so it has been in pretty much constant use since DD was 6 months old (she's 5 next month).