I think they came out pretty great. I used 3 succulents for each but depending on the size you could use more or less. It has been a couple weeks now and mine are doing great, remember not to overwater and allow the dirt to dry out before you water again.
Here is where I got all my supplies:
Hanging Glass Terrarium – CB2
Polished Pebbles – Etsy Shop
Adorable Succulents – Etsy Shop
Happy terrarium making!