I used the 8Ah version of that battery for a year and it worked well.
As I recall, it delivered 7.5 Ah till the LVC shut it off, which was around 20 miles.
The things I liked about it were,
Very clean construction, flawless paint, sturdy rack[seat post], HD charger connector,
The 3 -way switch[lock, on-off] worked very well,
Although it took a while to charge[3 to 4 hr.s full charge @ 3 A], it was plug and forget. The charger would shut off and the batt. chem is safe, so I could plug it in and hit the sack. If I was in a hurry[rare], it would charge to 80% in an hour and a half[the BMS balance function takes as long again to top off].
It held it's speed thoughout it's discharge curve, but there was 2 to 3 volts sag on starts and hills in the bottom half of curve.
The Anderson discharge lead is rather short[they do offer an extension]
I felt it was starting to lose a little capacity after a year of moderate usage, but was not able to confirm because,
All the cells died.
Not really the battery's fault though. I was working on an island in the Caribbean and when I left, the bike got stuck in a hot warehouse for a couple of months before it got shipped.
My thoughts after are,
Although somewhat pricey, it's a quality product that was right for me at the time.
But since I have been studying here for a while, I feel that I'm ready to give Lipo a try, so I wouldn't buy another.
But I like the box and rack so much, I'm thinking about trying to install some Lipo bricks inside and recycling those items[with the internal fuse and key switch]
And I'm also thinking about going with 13S Lipo so I can use the charger[54.6V hot]as a carry-on charger.