Anticipating that there would be folks who got banjitars for Christmas, I made this video to help them get up-and-running easily. I have seen reviews on various models of banjitars where people have blasted them for various quality issues, but what they're dealing with is the lack of a good setup. Unfortunately, like most guitars from Asian factories, the cost-cutting measures to hit a price point usually affect the setup before packing and shipping. Most music stores don't know what to do with them and they just stick them out on the shelf.
Even if you have had your banjitar for a while, there are some tips here that might be helpful. Check it out.