I highly recommend it, as if I were to pick one tube it would be that one. Make sure you purchase the French ones though. I believe the GT. Britain ones are Mullards, and the JAN ones are Military tubes iirc. My dad said he disliked the JANs a while ago, and other people agreed but then randomly took off in popularity.
If you do end up buying a French Philips/Amperex and greatly hate it. I would potentially trade you a different 12AT7 tube or one of my 6DJ8s. I would not mind having another one of these tubes on hand.The only problem would be I do not want to give up my Telefunken nor my Sylvania Triple Mica, and I can not guarantee the quality of the tube (well they would work) as my dads tester is testing the 12AT7s and 6DJ8s kind of funky. The mullard blackburn would not be available due to the poor testing (sounds fine though). Both 12AT7 and 6DJ8 are testing inconsistent and lower than it should so its potentially needs a re-calibration. I believe out of all the 12AT7s I am pretty sure only the telefunken tested strong, and recently there was decent difference in the cathode readings from the first test I had a week ago went from 105/103 to 100/90. The 6DJ8s all tested in the same range which was pretty poor (generally averaging around 60/50).
Edited by gamefreak054 - 2/5/14 at 9:19pm