I tested a prototype' machine at one of Baxters Education centres a few years back (in the UK) . It was NXstage sized, used UV sterlisation. And together with my mum as main carer we basically had to set up/program and disinfect, maintain the dummy machine, after being run through it once!
Whether the machine was for Baxter or another company I don't know.
I know the Quanta Selfcare plus is possibly the only competition for NXstage I know of at the moment
http://www.quantafs.com/selfcareplus.aspx