It doesn't appear to be all that different from a Viparspectra fixture or OceanRevive fixture other than better led brands (for what that's worth) and a slightly better looking case. But it's also twice the price. If you want the Cree leds and you really like the look of the case, spend the $120 and go for it.
On the other hand, I've used several JBJ products over the years and they have all been good quality. But I don't even know anybody who has a JBJ led fixture.
If you haven't looked already, spend $100 more and get a Reef Breeders Photon v2. Extremely slim case (1"), Cree and OSRAM leds (some 5 watt and some 3 watt). And it has sunrise/sunset/moonlights control (none of the above do) and it has 6 channels of color control, not just 2. If you like having control, or like playing with the light, IMHO it's well worth the extra $100.