It's now February of 2018. I've been using this bulb nearly every day and really like the light it gives off. There is a brief warm up when first turned on, but, only a few seconds.
Is it worth the price?
Probably not. I'm sure it uses the Tesla Technology as a way to increase price. And, reading another review how the bulb contains tiny bit of mercury is a turn off. (no pun intended)
The best thing about it, it fed my urge to try something new...with no regrets.