Congrats! Have used a Pantheon, cable management can be a pain but is rewarding in the end. The recessed board tray and the lack of top cable management opening are two major issues. However there are work around for both. For the latter you'll need to carefully route cables in front of the tray, binding them as you go so that they do not slip. For the latter you'll need to get a cable extender. Once you have that you can route 8/4 pin CPU power from the bottom management opening to the top then route the power cable in the case again and connect via extender
The best parts of the case are the easy to use top and front bays which are latched!