I have a medela swing and I love it... I was initially using it for full time expressing (when DD was in hospital and those first few weeks) and it held up to it quite easily. I would rinse the attachments under hot soapy water between each express session and then 'sterilise' them by boiling them in hot water for 5mins every other day.

You can get a attachment from chemists or the ABA so that it can be a double expresser but I didn't use it that way - I only used it as a single side expresser.

It has 2 cycles - a stimulation cycle and then a express cycle (probably not the techinical terms but that is what I called them) - overall it is definitely worth the $$$