I filled it up before I left for cape town, did not use it in cape town so popped it into a plastic bag and stuck it in my luggage for the return. I'm not sure if it was the airpressure or something pushing against it in my luggage but it leaked, luckily into the plastic bag.
I cleaned it up and left it on its side on my workbench, still with a small amount of lube in it, this weekend I went into the workshop and found a little puddle under the device.
On the next iteration I'd like them to come up with a way for the nozzle piece to lock into position on the bottle piece, so that when you unscrew the lid it does not unscrew the nozzle piece at the same time.
The next thing is the lube I'm using is clear, when using it out of its normal container it leaves a big enough sizes bubble on the link which lets you see that you've dropped lube on it, with the Luberetta you cant really see, so I landed up applying some pressure to squeeze the bottle and ran the chain around twice.
On the plus side it is quick to run the chain through, and having the guides means less concentration is needed.