The quality of any branch in a chain depends on the local management. The service in different pubs in the same chain can vary wildly just as the service in banks and supermarkets can.

The only time I have used JDW was for a leaving dring at work. Chosen becasue there was a non-smoking area provided plus food available when we got there at 6, no wait until 7 or 8 in the evening plus no musak. The whole experience was bland but reliable, suitable for the diverse crowd that was there but I have never bothered to go back in one since.