I haven't used them yet, but I have their top bar hive with similar bars. These are made of pine.
If you are going foundationless then frames of this style are the way to go. No need to nail/glue in comb guide as it is built in. Would have been 5 stars but the wood is a little roughed up in spots. Either a dull blade when they were milled or some other issue.
I purchased Frames and Wooden ware together. I haven't had time to assemble them yet. Upon inspection all components seem to be of good quality and well fitted. These are my winter projects to prep for spring expansion. I would recommend these products and purchase again.
Great! Very good and easy to put together.