We have a home nebuliser for DS2 which we've used ever since he was 16 months old; touch wood he hasn't needed it for over a year now, and only once last winter (he turned 4 in August). It kept him out of hospital on numerous occasions, though we did still have two admissions - the paediatrician (we were in Singapore at the time) let us stay at home as long as he didn't need nebulising more frequently than 4 hourly. We used a mixture of budesonide and salbutamol, so he was getting nebulised steroids as well. Don't think we would have got one so easily in the UK and we would have had a much scarier time with DS2 and been down at A&E all the time.