The solution has allowed our business to almost double year over year in the voice-over IP area because it greatly helps with our customer retention. It blocks what should not make it to our back end servers and allowing only the needed customer traffic. It provides great security rules for hacking attempts.

The appliances have not really had a measurable effect on our operating costs.

Since the load balancer appliances are comparatively inexpensive, I imagine they have given us ROI. We paid significantly less for these than we would have for their competitors. However, since the systems we load balance were new systems, it is hard to measure the ROI. 

It filled a requirement for our project, and it did so at lesser cost than their competitors.

In terms of saving money, they haven't really made a difference to our operating costs. It's not a cost-saving device.

I really don't know for sure, as we previously used Round Robin DNS. I think it is likely immeasurable, as the business revenue depends a lot on the load balancer. We cannot live without it.

While it's increased our uptime, we don't really justify cost as time - if that makes sense - so it's difficult to quantify.

The appliances have had a measurable effect on our operating costs. I wouldn't be able to put a finger on it as such, but yes, they've definitely helped.

I'm not really thinking of return of investment. For us it was important to make our network redundant and reliable. In that sense, yes there is a ROI, because you cannot run an organization without any redundancy. It needs to be reliable.

I don’t have any visibility of the ROI a company might be able to achieve.

The appliances have not had a measurable effect on our operating costs (payback on investment).