If you're using AirMagnet, it's a special use case. As long as they really walk you through it you should be fine. However, you do need some direction and training. If you don't have very much practice with it, it is difficult to troubleshoot.

It'd be nice if it was cheaper, however, you get value for your money.  

The surveying features are in need of improvement, along with general usability. For example, they should import functions from other products that make things easier from a planner's point of view.

The antenna options should be enhanced.

It takes a little while to render the coverage maps.

The price could be lower.

The updates are few and far between, so they should release them more regularly.

The throughput should be more advanced in the future. They need to add more versions of WiFi than just one.

There is a feature "no auto-save" when the Proxim USB is disattached accidentally during survey. Newer adapters (adpter that support 802.11ac) not support noise Reading (I'am using Proxim 9100 USB Adapter).