Great value and works well. However not compatible with DSI or DPI hardware
The CB1 and PI4B adapter both work exactly as advertised: An almost "drop-in" replacement for the Raspberry Pi. Unfortunately there is no support for the BIQU PI TFT43 DIP screen according to support and still no support for serial interfaces. (cams and screens)
If you don't need serial or parallel interfaces for external hardware, then this is a no-brainer. Just get it! Cheaper than an official RPi and provides pretty much the same functionality.
Worked RIght out of the Box
With Pi shortage I decided to try the PI4B adapter with CB1 for an octoprint/klipper alternative. It worked great out of the box. The instructions along with the hardware worked great. Happy with this purchase.
I recently purchased the BIGTREETECH PI4B Adapter V1.0 for my CM4 and it has been a great addition to my setup. The installation process was straightforward and the adapter fits perfectly on the board. The added connectivity options have been very convenient, and I've had no issues with performance. Overall, I am very satisfied with this product and would highly recommend it to others looking to expand their CM4 or CB1.