I have a NR, Dinotte, and MS currently. The MS hands down the best value for the $. Its bright, the light head is super nice but NOT perfect nor as waterproof as I would like to see, and priced where anyone can get to it.

IMHO, if someone can confirm that the Dinotte batteries will work with this I would just buy some 2-cell spares from Dinotte and re-wire the head to match the cord on the Dinotte battery. The Battery is really my biggest gripe, that and the stupid flash modes. I was lucky and got one of the 3-mode ones which works good by me.

This light is going to put a huge crimp in the DIY'ers on CPF and MTBR and once the word really gets out, probably bite into NR/L&M/Lupine/Cygolite market share.

Seriously, if people know about his light, who in their right mind would buy a ~90 lumen NR P4 Minewt USB for $120 when you can have a ~500 lumen MS for $90?

Well engineered P7's IMHO just about killed HID's from the bike market. HID's made sense when you only had multi-P4 LED based light engines and wanted a smaller form factor. But with good P7's out there, HIDs are silly: ramp up time + shorter run times + typically larger batteries + more fragile bulb + reduced performance over the life of the bulb = an inferior light to LED based on current technology for either.