My name is Mark Officer and I am responsible for the PerfectStroke training aid. I think your website is fantastic and that it is great that you respond so thoroughly to the questions that you are asked.
I must admit that I only found out about you and your site from a friend of mine who asked you to review the putting aid. For you to say that the aid is ' not too bad and as good as anything else out there' I suppose is a fair review.
The reason why I developed this device is because as a teaching professional I couldn't find any training aids that reflected my philosophies. I would search the internet and only find aids that tried to make the putter swing straight back and through and would mostly involve resting the putterhead on a board or such. We may differ in our opinion on straight back and inside and inside but I believe that the perfectstroke shows just how little the stroke does swing inside/inside. The lines on the plate indicating opening and closing are reference lines and not meant to represent what every stroke does. But I thought that it was important to have something to reference.
I think the trueplane device is quite good but it is very easy to apply some downward pressure inadvertently while using it then when you move away and putt freely the stroke goes too far inside/inside. One reason why with the perfectstroke I recommend that you hit putts from both the inside and the outside of the rail.
I look forward to you responding to this e-mail and perhaps we can talk about you re-writing the text on the website.