That's a good choice, mafig. I tried something similar and find it to be a bit better than your stock standard ego style battery. As with any product, there are pros and cons...and the pros outweigh the cons imho. Add to it the larger tank that I see in the picture, and it should give you a long vape in between charges or refills. Should outperform your existing 510 style e-cigs by a mile or two. A great product for moderate vapers from the newbie all the way up to vets.
That said, the performance is not even close to a decent mod or VV device, but it's a good starter for trying out different voltages. Happy vaping.