A powerful yet simple backup solution
We switched to DPM from a Symantec solution. This was more due to cost saving thanks to an enterprise agreement and less to due with the feature sets. We have been very happy with the decision and prefer the simplicity of DPM. We were a bit surprised by the resources, specifically RAM, that was required. The sizing calculator that Microsoft provides was nowhere close when it comes to the amount of RAM we needed. In fact, we maxed out the RAM in our DPM servers and they still have a RAM bottleneck.
Overall, we are very pleased with the product and it has saved us on several occasions.
With service pack 1, it is a complete solution for SharePoint backup.
Built on top of MS SQL Server
The interface is almost too simple. It is lacking some of the features other products have. This could also be considered a pro.