I've been using The Odin LEP for over a year now, so know a little about its capabilities. It's a great unit, if a little specialised.
I run it purely for night airsoft, in conjunction with bino NVG's and a Jerry C5 thermal ecoti overlay. I don't run an IR laser, and just use passive aiming with a Eotech XPS3.
On the rare occasions I use white light the LEP is pretty devastating, and wipes out the targets natural night vision, or causes their NOD's to autogate. You can get this effect with many weapon lights, but the Odin LEP really spotlights the target at medium to long airsoft ranges. It's especially useful for designating targets to other team members, whether they have NOD's or not. It reminds me of a stage follow spot in a theatre.
The light isn't a nice white high colour temperature, but more of a piss coloured yellow, which is disappointing, but acceptable. It's not so great at short distances, as you can struggle to cover the whole target with the spot of light. It's also pretty bulky, much more so than a Surefire Scout for example. Battery life is very good, as are the mounting options, remote switch and value. It's also great at reducing spill from your firing position, if you can mount it as far forwards as you can.
I've had it shone at me whilst messing about, and I didn't go blind - I think it's safe. I have seen brighter torches, and I am more concerned over the various Russian lasers and full power IR designators out there damaging peoples eyes and kit. It emits light at a frequency we can see and react to by shutting our eyes, unlike IR/red/green lasers.
It's a cool airsoft toy, but not really a game changer, IMHO. I'm lucky and daft enough to enjoy all of my NVG kit, but none of it is guaranteed 'pay to win' when up against decent teamwork and moderate NOD's/thermals.