For Meraki SD-WAN, I always go with retail companies.
The most valuable features I find in Meraki SD-WAN are that it's easier to manage cloud, cloud-managed, with a simpler deployment from Cisco Viptela or Cisco enterprise SD-WAN solution, and it combines the access point, so it is a much simpler deployment, usually fit for retail.
Meraki SD-WAN is deployed on cloud. The product is easy to use, and I think its interface and centralized management are good.
The pricing of Meraki SD-WAN depends compared to which vendors, because it's a bit pricey, so not all retail would go for it unless it's a big retail company, but it depends on your comparison.
I usually recommend multiple vendors in mind because it depends on the customer's requirements; you have Fortinet, you have Aruba, you have Huawei, and you have multiple options that may be cheaper than Cisco.
Regarding Meraki SD-WAN functionality, it depends on the situation, but I would recommend this product if they have the money. It all comes down to the requirements first because I try to fit the best solution for them. It doesn't depend only if I'm carrying only Cisco, it depends on what their exact requirements are. Cisco is one of the top vendors with the most stable performance in many solutions, but it all comes down to the customer requirements.
Mainly the pricing is a concern, and it doesn't fit enterprise customers. For enterprise-grade customers, it's not going to fit; it's not possible to use Meraki SD-WAN.
It's not just because of the price; it's for enterprise because of the limitation in features and capabilities. Meraki SD-WAN is not fit for enterprise-grade customers or big deployments.
I have been dealing with Meraki SD-WAN for three to four years.
I don't think they have any problems with the actual solution.
It's scalable with extensive features for Meraki SD-WAN. This is where the other SD-WAN solution can help, the Cisco Catalyst Manager, previously called Viptela.
Their technical support is responsive.
My company helps customers with the implementation of Meraki SD-WAN.
I usually recommend multiple vendors in mind because it depends on the customer's requirements; you have Fortinet, you have Aruba, you have Huawei, and you have multiple options that may be cheaper than Cisco.
I am working with Meraki SD-WAN along with other products including Alluvio Aternity, Splunk, and AppDynamics.
Cisco's Meraki SD-WAN has their own cloud, and there's no Meraki on-prem.
I rate Meraki SD-WAN a six out of ten.