Digital BW, The Print

PREFACE
I understand there are many "non-plugin methods" for doing color to 
BW conversions, e.g. the L channel, the best of individual color 
channels, Calculations command, Channel Mixer, CS3 BW adjustment 
layer, dual Hue/Sat adjustment layers, etc. 

I've used each of these individually or in combination at one time or 
another.

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ARE YOU USING... (or have you evaluated) 

any of the following (or other) PLUGINS/SCRIPTS?:
* B/W Styler - www.thepluginsite.com
* BW Workflow Pro - www.FredMiranda.com 
* Black and White Studio - www.powerretouche.com
* Silver Efex Pro - www.niksoftware.com

OPINIONS
If so I'd be interested in your opinions, experiences, features you 
like, comparison commentary, etc. 

Thanks.

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If possible, please RESIST irrelevant "real men/women don't use 
plugins for this purpose" commentary, OK? :-) I understand the 
generic pros/cons of plugins, actions, etc.