Looks very unstable, but guy is probalby minning some ubercrapcoin. Eitherway L3 looks nice but given S9 issues and first scrypt miner from Bitmain, i wouldn't trust it. One breakdown a year and you will lose all you gained from electricity.
Now is too early tell something bad about L3 because at least it holds the parameters of the specification as opposed to A4 batch1. In addition Inno 45 days of warranty vs Bitmain 90 days.
Inno had soft isse and after flashings its good. So warranty is ok. Bitmain it doesn't matter how long is warranty you still have to pay shipping at least one part if not both sides. And at least one month without minning. S9 has like 22-23 batches each bigger than total of A4 made. And it still breaks down.
And somewhere i read that L3 actually draw close to 500w. But take it with grain of salt.