What is the opinion of Reddit about the
Core Products D-Core Cervical Support Pillow, Extra Firm Standard, Full Size for Back Sleeping, Dual Extra Firm Neck Rolls?

I have used the following type of pillow for 20+ years and love it.

D-Core Cervical Support Pillow, Standard, White https://www.amazon.com/dp/B000H2Y78M/ref=cm_sw_r_cp_apa_i_8vxpCbX4W8ZV8 of pillow

The sides are for side sleeping, middle is for sleeping on your back. This type of pillow keeps the neck and spine in alignment.

Has anyone tried the D -CORE pillow?

Core Products D-Core Cervical Support Pillow, Extra Firm Standard, Full Size for Back Sleeping, Dual Extra Firm Neck Rolls https://www.amazon.com/dp/B000H2Y78M/ref=cm_sw_r_cp_api_glt_i_9760M1TACA01ZV777NGJ

This – https://www.amazon.ca/Core-Products-FIB-240-Cervical-Standard/dp/B000H2Y78M/ref=mp_s_a_1_58?crid=3KM3UODZX88UJ&keywords=pillow+hole&qid=1639947831&sprefix=pillow+hole%2Caps%2C92&sr=8-58