We have the Lynx and I like them. They are light weight, easy for anyone to handle, easy to store in the provided zippered bags, they don't move around when driving up on them, they clean up easy with a rinse as needed, and they do the job. They work well with Hoppy levels. One tick mark on the Hoppy level equals one inch which means one Lynx block. Three tick marks means you need to stack three Lynx blocks high. I also endorse the optional Lynx top caps and the wheels chocks. They all work very well together.
But there are other good products that do the same. I just happen to have experience with the Lynx brand.
