Eh, for the public, yes. Flashaholics should be able to cope...I haven't had trouble with reversed polarity as I've been careful. I'd prefer no RPP to not being able to run down to a volt. I have a dorcy cool-blue (metal) I use with a 4Ah NiCd D cell that runs over 40 hours.
Mostly I just wish LED Supply would answer its email quicker. Like, in less than a month. I'm still waiting for a reply to one I sent July 17th!
<sigh> Well, the product is so useful it's worth the wait.