Sugardrop tomatoes

[Squash64]

My son's just been telling me about some Sugardrop tomatoes he's eaten.  He said they are really good with a nice balance of sweetness and tartness (is there such a word?)

I think they are a hybrid, so saving seed from them might not give the same results but he's going to try anyway. 

Has anyone tried them? 

[Squash64]