I'll add my two cents.... I've been developing my own film for over 40 years, and have tried a lot of developers. That said, I've found that sticking to one developer and learning all you can about what it will or won't do, is the best bet for consistent results. But that's just me. I've used HC-110 for about 15 years now, as it stores very well, gives me the results I want, and I don't develop film on a regular basis. I will tell you that X-tol will go bad in the package. I had some for about 6 mos. and used it, and got no images at all. When I contacted Kodak about this problem, they said that it has a short shelf life, even in the package. (but for some reason they don't date it like their film.) Also, you don't know how long this developer has been on the shelf in the store either. But hey, I hear that ink will dry up in your printer too, if left to sit for a long time!
Ain't life a grin?