If you are familiar with VMware vSphere, you can use this feature comparison to understand what the Nutanix Acropolis Hypervisor and Acropolis Management Framework is capable of in Acropolis-base software version (AOS) 4.5.
The NPX Link-O-Rama is a great resource for all things NPX, including this applicable list of articles in my VCDX Deep-Dive series (more than 70 posts).
If you are looking for a supported, stable, basic hypervisor and you want to avoid the virtualisation tax, then Acropolis is worth considering. Nutanix is just getting started with Acropolis, so you can rest assured that the feature set will continue to rapidly evolve.
The vSphere to AHV feature comparison is a PDF that can be downloaded from here.
The key features that I think are missing in AOS 4.5 are:
- Network QoS to allow consolidation of all node traffic onto a single OVS bridge and 10GbE bond.
- Workload Resource Balancing across the cluster (CPU and RAM).
- Workload Placement affinity, anti-affinity and VM-host rules.
- VM-level Workload Protection (AHV could implement an agentless version of Guest OS Monitoring by restarting the VM after a timer expires for idle network and storage I/O and store a screenshot of the console just before the VM restart).
- Expose Host NUMA to Guest OS.
vcdx133.com 
Many thanks!