I'm not a big fan of them. They're often built poorly and look like they just threw in whatever was around rather than think about their potential for use and adding capacity that way. So, I make my own and typically don't mix the various types together.
Always looking for interesting plants for pollinators and food! Bonus points for highly, and pleasantly scented plants.
"Si hortum in bibliotheca habes, nihil deerit." [“If you have a garden and a library, you have everything you need.”] -- Marcus Tullius Cicero in Ad Familiares IX, 4, to Varro. 46 BCE