I own one and it's worth it.. THAT said I actually wish I'd have bought this:
https://www.apogeeinstruments.com/sq-520-full-spectrum-smart-quantum-sensor-usb/
Was a tough x-mas choice (black fri deals at BRS) since the 520 was below $300 (in my comfort zone for toys) I believe (not by much) but the Seneye was like $150
AND all "studies" showed it was adequate.
The other functions were just bells and whistles and ,frankly, don't really work as well as "I" would like.
Realistically there really isn't much difference in any of the "PAR" sensors for our uses...
Still the Apogee 50o's or Li-Cor is still the ultimate in precision.
I literally waited for years for the Apogee to upgrade their sensor (couldn't handle the red cut off) only to buy a Seneye..
go figure..
If money is no object.. get the Apogee esp. if all you want is PAR.
If you need something else from the Seneye, wait till black friday.. (no promises)
Can never have too few tools..
One trick pony's usually work best w/ that one trick..
Seneye is due for an upgrade..
JUST an opinion....