We use RecoverPoint for disaster recovery and asynchronous replication, and we use the application at a block level, not the software level. This has been tested, and it's very durable.
Integration with VMware is the only thing we need to improve. Another feature I'd like to see is the ability to convert management to HTML. And the integration should also be done on the same level.
It is worth mentioning that this solution is no longer supported, primarily because it doesn't replicate between two different storage systems anymore.
The solution normally supports only specific types and amounts of storage. If it could be increased to support much larger amounts or a wider range, it could fetch a bigger market.