I bought this collection, thinking it was the complete series. But it is not. It is 4 DVD disks, with 3 episodes on each DVD. Compiled into a "4 seasons" series. Now this is to be taken literally! It is not 4 seasons of the series (like for example "The Simpsons Season 1, 2, 3, 4 etc). It is a compilation of episodes put into the themes "Spring" (DVD 1), "Summer" (DVD 2), "Autumn" (DVD 3) and "Winter" (DVD 4). So there are a few episodes I remember, which were missing. I did not find the episode where Toad impersonates a ghost, which I remember to be rather amusing.
Therefore I give this collection 3 stars. Would have been 5 stars had it been the full and complete series. So the 3 stars has nothing to do with the quality of the episodes (they are wonderful as I remember them). Only the nature in which they have been selected in a sort of "greatest hits".