Bought separately to pair with a new PRVKE 21L V4

I have no issues with the product itself, however I will note that if you plan to bring larger telephoto zoom lenses, such as a 70-200mm with some TCs, they may be an extremely tight fit or not fit at all. I use a Nikon Z5ii with a Nikkor 28-400mm f/4-8 lens, this is important because it is a hefty superzoom that includes a wide square hood, and as a result I've had to shape the internals of the cube in a way that accommodates this exact setup when stowing the camera+lens. My future lens purchases are based around longer telephotos that are twice as long as the 28-400mm due to internal zoom/focus and I worry this case+bag won't work for my quick stow "single lens" use case, but that is a limitation of personally wanting a smaller bag.

I highly recommend following the install instructions to ensure you don't miss a step placing the cube in your bag!

The Essential Camera Cube fits my new PRVKE 21L perfectly and it's construction is top-notch. In addition, the fact that it can be zipped up and carried outside my bag means I no longer worry about having to check my equipment when flying on smaller planes - simply remove the cube and now my bag is lighter and the cube counts as a "personal item". Perfection!

The dividers are also great, thickly padded and easy to remove/adjust. This may seem like a small thing but when I compare them to other bags I've had, the difference in quality is both noticeable and appreciated.