I had high hopes for Blandings based on Jennifer Saunders' involvement. While she is quite good, the whole cast of regulars is excellent.
Unfortunately the first couple of episodes were just so-so and may have put off some reviewers who were in a rush to judgment when writing up their overly critical posts here. And there are a few occasional characters, like Baxter, who seem to not be quite on a par with the others, but their short-comings are more pronounced because the rest of the cast/characters are so excellent.
By the third and fourth episodes, the actors seem to have found their pace and settled very well into their characters. Timothy Spall is fantastic. Freddie, Beach, the maniacal gardener ... all of them are great in their roles and are laugh-out-loud funny.
Yes it is silly and yes it is quite different from the earlier Wodehouse inspired productions. If you want to see Hugh Laurie and Stephen Fry playing Bertie and Jeeves, then this is not a rehash of the slower paced, repetitive, 1950's, I Love Lucy style Wodehouse that they did so well. If that's your cuppa' ... and I enjoyed that series too ... then by all means watch them. Comparing the two serves no useful purpose.