Zend - Studio, Encoder, Optimiser...

I am writing several php applications wich demand speed & security. I'm just looking for some reassurances from some ppl that might be using the ZEND products to deliver this. Is the speed increase using the optimiser noticable? How well does the Encoder work? I will be trying them out today (the encoder neway), and Studio. Any comments would be appreciated by ppl who use it on any medium to large-scale deployment... Cheers, Brian... =============================================== Brian M McGarvie, Web Appications Co-ordinator/Consultant =============================================== [ www.mcgarvie.net | www.lennox-mckinlay.co.uk] ===============================================