Gotta try it first, then decide if you like it. It's only going to get more sour from where it sits now. I'd keg/bottle it if you like the taste and drink it.
I tried it. It was quite tasty. Hydrometer showed 1.007, so I bottled it and put them all in a Rubbermaid storage tote. I'll pop one in about 2.5 weeks and see how it is going. I may see if anyone in my brew club wants to trade for some of these since I don't think I should drink it all as fast as I can (that's a lot of 7% Dubbel), but want to make sure it gets consumed before any sour flavors try to take hold. I bleached my bucket, air lock, lid and the lid seal last night (since it developed in secondary, I think my plastic tubing and associated items are clean), but I may get rid of the stuff anyway. I haven't decided. I may also do a cheap, easy recipe just to see if any infection takes hold and if so, I'm not out a lot of money or time.