I've only gotten to use this once but it looks promising. Basic idea is that two of your players open with the universal gadget item. They move together and get one enemy under 1300 health then both of you cast the gadget. This will net a quick kill. At level 1, you only get 900 gold back for this(600 for the kill, 300 for the assist) so it actually puts you down 100 gold as the trade off. I think it's worth it though because that's a good 30-40 seconds that their player isn't creeping(so he loses out on gold and critical early game experience). You can actually each get two of them with your starting gold and then do it to two players. It doesn't work once players get over 2.5k health or so because they'll retreat before their health gets anywhere near that low. At level 1 though, your health just starts that low.
Obvious potential counters:
QoT shield
Sedna heal
The healing potions with a 0.3s cast time(to get you back over 1300 before the gadget finishes casting, it's on a 2 second cast time)
Turning around the instant you see two dgs together early on(but this means losing out on that lane for the moment, which could be very bad).
Possible ways to deal with the said obvious potential counters:
Cancel the cast and whack them some more
. Your own nukes help.
Mass charm
Deep Freeze
A third player with the gadget(this will put you behind more gold for the kill though and is harder to coordinate)