And that's the key - If you like it that's what matters most.
The only issue is that folks, especially first time around, should try going with the 100% juice so that they can taste all the characters of THAT juice. You can always blend in other juices/wines like apple, pear etc. THIS is of course just a personal call here. It just seems to me that until you have had the 100% juice, you can't tell how it stands by itself.
At present there is one more issue - supply sources are tightening up.
Additionally as a couple of other folks have mentioned on here, some makers may be adding to the juice or creating a juice that might not be optimal for wine making. So a lot of our choices come down to personal experience. Unless you hear something truly negative about a source, trying it once or twice might not be a bad idea. We did see some folks get upset, me included, when one supplier failed to mention that their wine bases had either been change to a blend of juices OR they were just never honest with folks about what was in the wine base. In that particular case the state agency overseeing their sales, tagged them with a citation for that behavior and a couple others.