Most definitely the best version of Agatha Christie's classic series!
David Suchet is, for me, the definative Poirot. The neat, dapper sleuth who uses 'the little grey cells' instead of guns, and violence.
The period settings are delightful, and one of my favourite eras is beautifully portrayed and becomes quote real to us.
Poirot is a top notch drama, and I feel it will last through the ages and the multitudes of other mystery shows.