There are a lot of benefits to install a Custom Recovery, for instance like CWM on HTC Desire 601. With the custom Recovery you will be able to flash ROMs, and Apply updates and manage your device more efficiently as compared to the stock recovery. HTC Desire 601 is a pretty good, device and you can surely increase the productivity of your deivce, by installing cwm as it will help you to do many things.
But for those who are still wondering what cwm is, it is a custom recovery that replaces the stock recovery that has been install on every android device, by the manufacturer. It is like the last resort, as when your device fails, you can recover it from recovery. In case of bootloops, etc. From it, you can wipe cache and do many things. Read more about CWM Recovery here.