Yes, I have the Dive Rite LX 20. My husband and I got a very nice deal on a pair, so we said what the heck, and bought them. There are cheaper options out there, like the Big Blue lights (they really do pack a punch!). But Dive Rite has always been good to us, and I liked the idea of giving them business so they will continue to be there for us in the future. I am goofy that way.
Anyway, we used the lights for the first time last week in the Mexican caves. I liked it very much. Having been used to a DR 10W HID canister for the last several years, the lack of cord was absolutely liberating - especially in sidemount configuration, where the cord coming out of my bum was frankly annoying. I also appreciated the greater light output. There were times, especially as we were traversing "black" cave, that I would have appreciated blindingly powerful lights, but then I remembered how much I hated being followed by them (I have a buddy who is a videographer, and having him behind you is like being followed by a Mack truck on a country highway at night), and started appreciating my own light again. I did four hour dives on full power, and the light behaved beautifully - you're supposed to get a blinky warning as the battery gets low, but ours never did. The quick release mount (QRM) glove was also comfortable, but I was a bit worried about the security of the light on the glove - especially as I was tugging at gear and trying to get everything adjusted and battened down on my shakedown dives. My husband got around that issue by attaching a bolt-snap to the other end of the light with some cave line and clipping it to a thick bungee bracelet around each of our wrists. It worked fine.
There's a lot to be said for buying cheaper and more powerful lights with shorter burn times, and bringing a couple with you into the water when one dies, but I love my DR. No regrets here.