I had a good Cove N as well, but werent some of them flat because the bottle did not work with the N2? Something about the big bottle not working as well as a small one or widget loaded can. Not to slag them, just what an employee at a store told me.
I dunno about the bottled version. I had a glass out of the tap at the brewery a couple of Friday's ago.
When I bought the P49 nitro, the cashier at the liquor store commented that he found there was a noticeable difference in the body if you slowly poured it into a glass instead of doing the full inverted "hard" pour, as recommended by both P49 and Deep Cove to get the full effect of the N2.