Pros: I had been frustrated with ceramic holders, but these coil holders allow for use of broken coils & the air flow keeps the coils burning so they don't burn out prematurely. I can break off pieces of full coils to customize the amount of time I need them and avoid wasting full-size coils.Cons: while they are lightweight, they seem a little flimsy (have held up will after 1 month of use), and the material turns black as the coils burn on them (aesthetic only). The appearance is a little odd & I would prefer something that blends in with the outdoor setting better.Overall, these met my needs and I would buy these again.