I really wanted these to worth buying; but they aren't.
A 5x 1070 rig costs almost exactly the same and will produce 1900+ sol/s @ ~850 watts with stock settings.
With optimized settings you should be able to get 1900+ sol/s @ ~550 watts.
This is with equipment that is easy to resell, and is likely to hold its value well over time.
The panda miner needs to be both; way more efficient, and have a significantly lower price.
As it is now: it's just a ripoff targeting new miners.
I don't mine nvidia cards but if you are correct
you need to spend 399 per card 5 x 400 = 2000 + 300 is 2300
so the 1070 gets 375h? if so it would be better. but I dont use them. do you have a rig of nvidia 1070 mining if so please place a screen shot showing 5 cards getting around 1800-1900 h and please show the 850 watts at the wall.
Not to mention you need to have some way to mount them all which cost's money where as this comes in one unit plug and play. Buying cards and setting them up requires additional work and investment.