Show me unbiased proof that MIT Sony media isn't garbage, otherwise the overwhelming majority here will tell you there's better media for the price..
To me that says something. I can show you scan after scan after scan on any burner you choose at nearly every speed (NEC, optiarc, liteon, lg, benq, samsung, you name it and I've likely used it).
Fact is, your opinion largely depends on how you interpret and how accurate you accept these scans to be. For someone who simply needs a burned DVD to watch in their standalone player, in depth research and scanning is likely going to be a waste of one's time, because Sony like most every other media will do the job.
For me, I spend a lot of time researching and testing different media, so I know I'm getting the best for my money. If I choose to make a large collection of backups, I will feel a lot better about leaving them for 5 years knowing I used quality media that has burned well for me (subjective), and not coming back to ruined backups.
I don't spend time on here posting my experiences with the various media for my health, and I'm certainly not a "fanboy" of any certain brand. But I'll feel better at the end of the day advising someone to spend their 25$ on a 100 pack of MCC 004 then to send them off buying lesser quality Sony. To each their own, I accept your opinion and it is truly fantastic that you've had great results with Sony media. But on the flip side you do have to accept the opinions of others, and you'll find the majority conflict with your own.
You can ask others to post scans of Sony D21 (16x +R). I thought I had some (I have several here I can test if you'd like) but I don't have any stored scans on my computer. Here's various scans of 16x -R Sony media, and also some alternatives (in a similar AND cheaper price range). I can recall Sony D21 performing marginally better, but it wasn't anything to write home about.
Given the examples I'd say finding something better is anything but hard-pressed.