It is easy to install the solution. 

The flash ability, in terms of tiering and caching, is amazing. 

Traditionally, when you use other storage solutions, when you tier, you need to get a license. There are some limitations to tiering with this solution. You have got the caching media, for example. For Microsoft, as long as the hardware is still certified or in the server, you can use it. Most vendors, including Dell, IBM, and Fuji Shield include plenty of hardware that you can use which is certified for Microsoft Windows. 

It's mainly about the storage expansion, like in hyper-converged solutions.

Resiliency. There were many situations I put myself in while testing, and the data was never at risk.

The performance, reliability, and affordability has been most valuable.

I think probably the most important feature in this product is the caching capabilities using the storage-class memory.  

The most valuable feature is that there is no single point of failure. There are many individual places that can fail, but you do not have general failures.