Picked up a pack of these plastic-necked oddities at Walmart for the cobrapack type fixture. I ordinarily would find the plastic base hideous in a supposedly decorative bulb, but I needed something in the A21, long-neck size range to fit the optics of the fixture's refractor housing. As it is, it's probably not nearly bright enough and I'm finding that even in a "Pixar Drafting Table" desk lamp the light output is substantially more diffuse than a 150w/200w clear A21 would be.
The color temperature, despite being rated 2700K, seems quite warm, as seems typical of many 2700K-range filament LED bulbs. Granted, it's a phosphor, so it doesn't incandescence and get whiter/hotter with wattage increases.
60Hz flicker is visible but is no worse than a magnetically ballasted fluorescent; in fact to the naked eye it isn't even all that detectable unless you intentionally look for it.
At 1500 lumens I wouldn't call it a true 100w equivalent, but it's no worse than those 72w modified spectrum halogens (cringes)