They seem amazing at first, until you realize that every single one is going to fail after 3-4 weeks!
As the title says. I purchased 25; and installed 7 in an indoor/outdoor LV setup. Initially I thought they were great, though too bright for my preferences. I also wouldn't consider the light "warm" by any stretch. It is more of a bright white - definitely not the temperature of incandescents.
Unfortunately, after 3-4 weeks, one started flashing on and off - then another - in a random pattern, and suddenly I had a whole haunted house vibe going that was not desired. They failed after just a couple more days, as did additional lights; first getting dim as individual surface mounted LEDs failed, then going totally dark as the last one went out. It would appear that the failure is mainly due to failed solder joints, not a failure of the LEDs themselves.
It is a moot point though. At this point, 6 of the original 7 have failed (in 6 weeks!), and I am replacing them out of the surplus. I don't expect them to fare any better though, and this is with ideal/summer weather. I can't imagine what they would do if the temperature dropped into winter.
In the end, it is a complete waste of money - you would do better to buy elsewhere. Very disappointing!