The 2001 series wasn't too bad (I've got it all on VHS still that I recorded). Brenda Longman still voiced Soo, the puppet design were OK. I remember being so disappointed by the 2002 series though. It just wasn't the Sooty (show) I grew up with and enjoyed. Soo had a character change and became rather naughty IIRC as well the voice change, and the puppet design change for all the characters
Thankfully we've had three further series since then that have been excellent, and have managed to acknowledge the history of the show whilst being more modern. The choice of the wedding episode to air first from the 2011 revival was fantastic as it got in the camper van, the other characters (Scampi, Butch, Ramsbottom, Sweep's Family etc) without being forced and the classic (to me) bedroom set. Hopefully not another five year wait for the next series!