Persistent storage & great availability.
There is always a machine available when I need one. I can choose the machine size (cost) based on my needs. Many applications are available, and ComfyUI has many "baked-in" checkpoints that don't count toward your storage. Persistent offline storage means your instances load quickly without downloading your checkpoints, LORAs, etc., every time. You get 50GB of storage for free and another 50GB just by asking for it in Discord. The per-hour costs are a little higher than others, but the persistent storage and fast loads make up for it, IMO. I needed support today, and they resolved my issue quickly.