I've had one now for a little over 9 months. It works as well as my HP58503A or my Spectracom Ageless Oscillator. The output is clean, and for the price, you can't go wrong. Yes you can get one of the Chinese GPSDO's from BG7TBL for a little less, but the noise is less out of the Leo Bodnar GPSDO, plus you can program the GPSDO to produce a different reference frequency. I love mine
Bill, K1FPV