Visited with the Groupon deal ($8 for $15) and got 3 pieces with fries and only paid extra 80 cents to cover taxes. This turned out to be an amazing deal.
The fish were quite fresh and the batter is not overpowering. They were very flexible and allowed the pieces to be coated with their 3 different kind of batter: original breaded, beer batter, Japanese panko crust.
The most flavourful batter was the Japanese panko crust that had a good balance of saltiness and mild spices, which was my personal favourite. However one may find this batter too overpowering. The original breaded is quite standard while beer batter provides a light and crisp taste.
Also, get the signature sauce as it's quite good. It taste like a tarter based sauce with a hint of spicy mayo.
Overall, this is a fantastic Groupon deal that I would highly recommend. It's little pricey without the Groupon but still reasonable if you are craving some fish and chips.