They may be more difficult to mount straight than a fully hand made tire like some Challenges, Veloflex, top Vittorias, Dugast and the others at the top, but that doesn't put them in the bottom of the barrell. IMO what's at the bottom are Continental Giros and Vittoria Rallye. I've had some good experience with the V-R, but some bad ones as well, and at least one user here has had them spontaneously break for no apparent reason (sent me the evidence, FWIW).

The YJs give IMO a decent ride, that with careful setting of tire pressure is supple and smooth. Some other tires that cost a lot more are rather more harsh, such as the Conti Sprinter.

One that is also cheap, but a much better ride, is the Gommitalia Champion.

I know it's not easy to search on BF, but a review of the list of C&V links thread should show you a very long thread called "Totally Tubular." It was supposed to be an easy to find place for existing tubular knowledge and the debates about it, and for us to update as we learned new things. All this is in there. It's smart to rethink when you read a negative review, but you have to learn the people, too. Many of us try to be even handed and not overstate the goods or the bads. Glowing reviews are not common here. What you got from iab was honest, but I think more information is available for you to consider.

I think the YJ is still a bargain, unless you can find Gommitalia Champions. If you want to give tubulars a trial for a low price, those two (the YJ and the Gommi) are the choices. Both are Thai-made, decent rides, and amazing value for the money. If, after you like them, you want to spring >$100 each to see what's at the top of the range, you'll have a benchmark before you buy.

Your PX-10 is worth the best, btw!