That's very odd! I'll admit there are quite a few of their flavors that are less than par but I vape several of them quite often.
But I also have the luxury of being able to taste every one of their flavors before I buy it.
Modded one for a buddy yesterday. Slotted it similar to Josh's. I used a 3/32 i believe to drill all 3 holes larger, then used a dremil to finish the slot. Turned out pretty well I'll get pics when I can.