I don't buy garbage, sorry.
Only the best.
And you know this how EXACTLY? Personal experience seems out of the question, so...
FYI, I use Amare Technology SE 260 and P-3, also I have a BML SPYDR 600 (6 bars). with a combination of diode spectrums that Nick and I collaborated on way back in 2014, the spectrums are very similar to what SF is doing now, except 660 wasn't stable then, and far red wasn't a thing, so I went with 630 which I was told at that time, provides 90%+ of 660, but is stable
Note the lights the OP is asking about are not the best/money no object. In that grouping I see SF as a reasonable alternative