So, I have a hard time recommending the Dio Node for iPhone-centric music listeners, given that HomePod minis can be had on sale for the same price as a Dio Node three-pack per-unit cost.
The Dio Node sounds great for a single Wi-Fi speaker, but a lack of stereo pairing and the extremely close proximity of the HomePod mini to the price point make it a tough choice.
Dio Node review - one Dio Node.
The Dio Node is good, and approximately the same depth of sound and bass that a single HomePod mini will do.
AirPlay takes care of the integration on Dio Node, and a lack of a microphone is either a selling point or a major detractor.