F5 Silverline Managed Services is recognized as one of the best solutions in Gartner for WAF; I believe it can effectively manage vast amounts of traffic better than other brands like Citrix or FortiGate's WAF solution.
If the company is a government entity, they primarily use the hardware solution; smaller companies mostly utilize the DVM solution.
The deployment model does not affect visibility and control over security; the difference is only in performance.
The performance is generally good; it depends on the topology, but if the topology is okay and the product is efficiently used, it's acceptable.
I would rate the scalability of F5 Silverline Managed Services as a nine.
I would rate technical support as a seven point five.
I rate technical support as seven because F5 Silverline Managed Services lacks a TAC team in Turkey, which means escalation takes time, and I don't typically give high ratings to any vendor.
I rate this product an overall eight.