I have a JR Aquascope - in terms of case construction & finishing, it is absolutely *top notch* and better than average at their list price, let alone at sale price. Their deployant puts those on my more expensive watches to shame, and their rubber straps are also very nice (check out the blue rubbergator).
The brand lacks the same fame as its bigger brother, GP, and they have been clearing out their older models of late even in the US - apparently, they are going to do down a different path in terms of strategy. So if that stuff matters to you, avoid.
But from a construction/quality/fit/finish point of view, they are a very under-rated brand, and at 50% off, they represent absolutely *fantastic* value.