I tend to agree with the conclusion that a WBX engine is just a failure waiting to happen, although my experience is different. They start to get coolant into the combustion chamber, and then it's all over. The Sooby is the conversion of choice, and consequently, the cheapest route.
When I bought my Kombi in 1996, it had 85k on it and thankfully, the PO had kept it in immaculate condition. I have reciepts all the way back to 86' to include the original window sticker! Since then I have put a zillion miles on it and it still pulls strong. I routinely drove it from state to state on business. By far the most reliable vehicle I have ever owned.
I guess the point is if you take good care of them, and follow up on maintainance, they can be a reliable engine. The problem here is that people don't read the manual, and there is no telling what the PO did with the vehicle. This gives the design an unfair reputation. I too was planning on doing the sooby convert when the engine blew out, but I have not had the chance as she will not die! All hail the super WBX!