Initially I borrowed an calypso pump from my maternity unit after using the larger pump on the unit. After a week I purchased my own calypso as it became apparent that breastfeeding wasn’t going to work for us. The pump is easy to use, quiet with variable vacuum and cycles. It’s very simple to put the bottles together for expressing, easy to clean and sterilise. After a few days, one of the membrane pots wasn’t working properly, I spoke with Freek at Ardo who was so helpful and spare parts arrived the next day. The customer service is fabulous. Highly recommend this pump and the company for service. As I bought my pump, I can’t comment on their rental packages or returns.