Sony PlayStation Portal review: Portal to disappointment - Reviewed

Literally any other handheld will do. Even the more expensive ones.
The PlayStation Portal works fine under extremely specific circumstances

PlayStation Portal - Review Thread Sony - Reviews - Tech

PlayStation Portal review: fine device for a bizarrely narrow audience - Polygon, playstation portal

PlayStation Portal Review

PlayStation Portal review: PS5 on the go

IS THE Playstation Portal THE BIGGEST DISAPPOINTMENT OF OUR GENERATION IN GAMING?

Sony PlayStation Portal review: Portal to disappointment - Reviewed

PlayStation Portal impressions: hands-on with Sony's remote play handheld for PS5 - The Verge

PlayStation Portal: Hands On With Sony's New Remote Play Handheld - IGN

PlayStation Portal: The controller with a screen is surprisingly awesome