I have these. They are TCXO version of the RFM95W. Hence more expensive. On a regular RFM95W, it works at best on the borderline at 125kHZ and SF=12. And not reliably at these settings especially when your data is slightly longer. These are made to order on MOQ. After testing them out, it then works reliably at BW=125kHz and SF=12. But although claimed to work down to 62.5kHz, it doesn’t work for me. And one more drawback is the sleep current consumption as the TCXO circuitry doesn’t have a shutdown implementation, so it consumes 600uA during sleep.