It's okay but the floor is uneven you can't get as good of germination as with a tub a lbs putting right on the Matt, I mean the company fixed the defective one with a replacement and that has 70/75% efficacy and a bit of learning curve with the adjustable dome and , dials for humidity , also got a T3 kit and the controller while like any had its problems the probe is always 5 degrees off even after resets, but that is another issue and as far as just the dome get at least a heatmat for it , and the T3 kit if calibrated perfect is a good deal if you find it (smart controller Mat and then add this done , and small fan on second outlet so heat pad and air flow temp up hjmdity down , on off works much better than just matt )40 efficacy to 70/70%