I have used Big Mountain a few times and every time it is a big hassle. They don't keep up with prescriptions, they always blame me for not submitting even thought I have copies of everytime I submit one.
They are usually pretty rude to deal with as well. I have used them because their prices are reasonable, however it doesn't seem worth it anymore. I can afford to pay a little more to not be treated like I'm bothering them with my order.
Good Luck to those who continue to use them, as for me... I'm Out!