I received the TL-Racker today. I haven't gotten to shoot with it yet (hopefully tomorrow) but I really like it. It's really well thought out.
The grip feels similar to the AFG I had before, but the angle is more natural and the way it fills my palm feels just right. For the Shockwave version of the TL-Racker, Streamlight adde more of a hook to the area just behind the light, giving a very positive hand stop. They also added swivels and a hand strap for those who are worried about their hand slipping off. The combination of ribs and texture give a really good grip without being overly aggressive.
The activation strips fall very easily to hand; a quick press turns the light on and another turns it off. Holding the switch a little longer activates momentary mode and releasing it turns the light off again. Streamlight increased the light output from it's original 850 to 1000 lumens for this second generation TL-Racker. The beam is a good medium spread between spot and flood.
The battery compartment is sealed with an o-ring and holds 2 CR123 batteries. The cap is plastic and has a notch that is VERY OBVIOUSLY sized to allow you to use a quarter to turn it if the cap gets stuck. I can't tell you have many idiots I've seen on Youtube who have buggered up the cap trying to turn it with a flathead screwdriver (facepalm).
The provisions for the hand strap are pretty well thought out, even if the strap itself looks and feels cheap. If I was planning to leave a strap on my gun on, I would replace it with a woven paracord strap. Since my Shockwave has a pistol brace and a front sling mount, and the TL-Racker has a built in hand stop, I'd really have to try to get my hand out in front of a live round. I don't like how the strap catches my hand and require extra movement for me to get my support hand back to the breach area to load a round. I'll be taking it off post haste.
I still don't think the TL-Racker looks as good as the Magpul MOE, but it's not as ugly in person as I thought it looked from the pics I saw before I bought it. Or maybe the great fit, feel and function is making it look better to me that it would otherwise. I guess the ultimate beauty is utility when it come to an HD/SD tool.