myBlu isn't really any good to begin with, and imo, not worth rebuilding either. If you're stuck on one available at gas stations, Vuse Alto is much better. Their juice is made by Halo, and it delivers a really decent hit. You can refill them, but I haven't had mine long enough to know how well that works, and how long the coil will last. I'm on my first refill.
The best pod I've tried (out of many) is the Vladdin RE. Pods come empty, designed to be filled with your juice. And you can refill many times. I've been using mine for about 8 months, and it's still the best out there.