Newie...Siemens Nitro 300 SP

I am in Australia. Wanting views on this new aid I am trialling which I am having problems adjusting to. I have steep sloping hearing loss . This aid is automatic which I dont like. In past I had Siemens Cielo which I found better than this new one. Before that I had Siemens Prisma 2D SP. I cant hear high frequencies know this always make it harder for me to hear. Still if anyone out there has any experience with this new aid, please let me know. Thanks Robyn