i know the feeling. no, i'm not familiar with lucky 7. though, i will say that tasting some juice and getting something you like will likely save you money in the longrun. if you have a local place that will let you taste, go there and get something you like. less wasted purchases. mount baker has some decent juice. nothing that really stands out. they also carry a whole lot that aren't exactly winners. don't get me wrong. i send my friends and family there first often times. most people are reluctant to spend the dough on something they'll really enjoy right off the bat. but having that something available to take a break from that one juice that somewhat worked out really takes the edge off sometimes. it's what allows a couple people i know to go back to their mount baker juice at the end of the weekend.
dunno if you know the ropes, but always spend at least $15 before shipping from mtbaker to get the free sample and put in the comments section what juice you want to try, the pg/vg blend you'd prefer it in and the nic content you'll vape it at. that way if you like it, it's a bottle worth vaping you didn't have to pay for. also... always use the code vaporfrombaker for a discount on every order.