Yes they are sturdy and durable and easy to use although best for study stemmed plants or trees
I've just started the air-layering process, so I don't know whether it worked for me yet, but the product is great. The plastic is firm and well-molded.
These are ok. They are difficult to close and it is easy to spill the medium out of. The concept is nice, but I wish they were produced a little better.
I love these and didn't think they would work well, but I have tried every method and nothing worked at a good rate, ever. but these work so good, that i have now forgotten about all the cuttings I used to try to propagate and failed. :) If you want to make a baby version of your favorite tree, bush or plant, try these!! you can't really go wrong