I received the grip today and I am not happy (but glad you mentioned the $160 price). The grip seems very well made and substantially strong (I haven't attached it to the camera yet and won't until I can inspect the attachment mechanism and the method necessary to detach it if that mechanism fails).
I have already emailed Adorama and complained about the price screw-up. I'm assuming that they will refund me $40 and if they don't I will be returning it and buying the $160 version.
For the moment I will say that it is a good deal at $160 (I thought it was a good deal at $199). If after design analysis I change my mind I will also post that opinion.
... edit ...
Well that was a piece of cake. Good folks there at Adorama (maybe all the NYC camera folks would do the same). I called customer service and explained the situation and they indicated that I would be refunded the $39.90 (or whatever change). I'm again pleased! Oh, and yeah, it did come with both battery holders (EN-EL15 and AAs).