The problem with them (Lotus12) is reliability. I went thru 6 of them over the course of about a year. They could be found for around $50 at the time.
So, green as grass, I bought some used Siemens for $500. Those lasted about a year. The repair was $300 (2) that was fortunately refunded when the heat related (guess) problem didn’t go away. Of course there isn’t a factory warranty and aids from all brands fail with regularity. Used and Chinese seem more prone. I was lucky in one respect. My ENT had an audiologist who provided adjustments for a 1-time $75.
Of course it was about 2+ years and compared to the alternatives ($3-6K) it was cheap. Looking back, I’d have to say too cheap and problematic. For me, Costco works out to be just as about as cheap and supported.