At first, I was disappointed that this product did not work for me. For starters, I was lighting three kits I have displayed all on the same table with it. As such, the battery only lasted about two hours at a time before needing a full recharge. What was especially frustrating was that sometimes, I would leave the USB Power Bank to charge over night, and I would wake up to find that it had not charged.
Thankfully, Light My Bricks has an amazing customer support team, and thus the good score. While the USB Power Bank is meant for lighting one kit, I needed to light three, so it simply was not the best fit for my needs. The customer service team directed me towards the USB Wall Adapter and has been very generous!
In short, from my personal experience I can only recommend the USB Power Bank for powering 1 kit or a smaller quantity of lights. If you are lightning a large amount of kits, the battery life is quite weak for it. However, Light My Bricks is a great team, and definitely reach out to them with questions about your own personal display / needs since they are super helpful!