Fantastic for keeping your congas safe, very durable and sturdy. Also nice and versatile, if there's no congas on the gig they're great for hardware, other drums like djembes, or those bits and bobs that don't fit well in other cases.
Only thing missing is a handle/grip on the opposite side that might make handling a bit easier in some situations, the bottom of the case bashes into your legs when dragging it with the wheels. Pretty minor issue though, not a huge concern.