I’ve just finished an extended loan of one and my review of it will be on the SVBONY website soon.
In some aspects, I actually preferred using it to my skywatcher Ed72, particularly the built-in field rotator making for easy target-framing. It’s very capable both photographically and visually and I managed to take a dozen or so images which I was happy with.
On paper it’s SPL-51 glass might sound less impressive than the SPL-53 found elsewhere, but i reckon in 95% of cases, observing conditions and poor processing skills (like mine) would be the major limiting factors rather than whether the glass is one sort or the other.