The most important feature about this product is its ability to store lots of power at one time with very low maintenance costs. This gives you great flexibility when it comes to your business needs. I haven't found anything yet. It has been working well for us so far! If there's something I dislike about this product I cannot think of it right now. It seems like a reliable solution in terms of storing large amounts of power. We are using this specifically as an emergency backup source for our data center during outages or brownouts.