I am using an Asiair (original-works great) and have an Asiair Pro on order. I also have a Stellarmate for which I downloaded the OS and put on a Pi4 myself. I control with my phone or a tablet. The Asiair works great and I can be imaging in about 20 minutes. Stellarmate I use for visual typically (since it interfaces with Skysafari and sometimes when I need to phd2 directly due to checking parameters or for testing guide settings. Asiair has a basic version of phd2 where you can change guide exposure time, aggressiveness, and some other settings, but cannot do diagnostics or many detailed settings.
I do mostly imaging and maximizing sky time has been invaluable. It also makes the process portable and cuts down on the power requirement significantly.
Scope: ES ED102
Mounts: ES EXOS2-PMC-8, SkyWatcher Star Adventurer
Cameras: ASI1600MM Pro, Nikon D7500
Lens: Nikon 200-500mm, Tamron 70-200mm G2, Nikon 120mm manual lens
Misc: ZWO ASI120Mini Guide Camera, ZWO 30mm mini guidescope, Stellarmate, Asiair
Software: Kstars, SkySafari, ExploreStars (android), Pixinsight, DeepSkyStacker, Regim, Astrostakkert, LR/PS, RNC-color-stretch
Computer: Macbook Pro, Surface Pro 4, iPhone, Fire 7