I've got those snails, also using them as my Beasts of Nurgle.
I use them (and still do, screw AoS
) in my WHFB
army as Beasts of Nurgle and size wise they are definately big enough for the needs. They are so big that they barely fit onto 40x40 square bases and lord knows they don't rank up very well. But they are very nice, high-quality models. Recommended.
I'm running a Daemon at the bottom of the Garden list using Snails, Blight flies, an Aracnarock as my Daemon engine and this lady as my Great Unclean One