I like Anker. I have several of their multi port chargers, etc. But I do not like them that much to buy an imitation Dot when the real McCoy can be bought for $35 on sale. I'll pass on this.
I also predict that this fall there will be new models of Echo, Dot and even Taps since they are all overdue for a face lift in light of the G Home success. So, wait and see if this comes true before buying much of anything until then. All the Alexa devices have been deeply discounted lately which is a clear sign inventory clearance of the current stuff is taking place to make room for newer ones.