**Firmness:** Some customers find the pillow too firm, especially if used to softer pillows.

- **Odor:** A few users mention a slight chemical smell upon unpacking, which typically dissipates after a few days.

- **Adjustment Period:** It may take some time for new users to adapt to the contoured shape.

https://www.offerplox.com/e-commerce/derila-ergo-pillow-review/