I'm totally sold on the Sparks' method (or whoever developed it). I like certain aspects of Triangulaid, but I have some difficulties with it, too. Perhaps Stephane can address these.
I have/had a really good conventional swing. I grew up playing golf, living across from a golf course and having a membership and lots of instruction since I was 8-years-old. However, beginning in my mid-thirties, I started having to carry Ibuprofen in my bag and in my forties, hurt my back to the point I didn't think I would play much longer.
I went to Don Trahan's swing and had great success with it. However, I think it demands a lot of upper body strength, so I was looking for something to bring the body flow back into the swing. I went more toward Paul Wilson. As I added more and more body back into the swing, I began getting sore again. That's when Steve (and Scott, by proxy) turned me onto Sparks. This board then turned me onto Triangulaid.
I believe Wilson's swing takes a huge amount of timing to execute properly. He allows the back arm (right arm for us right-handers) to fold at the top. This is a powerful move, but it takes a great deal of timing to execute. As a result, I have had control problems every time I try Paul's swing. Sparks allows the arm to collapse a bit, too, but I don't get the sense that he promotes this collapse. He just says that a completely stiff left arm isn't necessary. In the four games I played using Sparks swing I hit the ball really well, missed very few fairways, and walked off the course completely pain-free.
Now enter Stephane's Triangulaid. I must say that the walking drill is brilliant. I'm not sure what it is about this exercise, but when I did it on the range, I hit every one of the shots on the centre of the club and straight down my line. I do want to also try the triangle to work the ball. My problem with this swing is that it allows the front arm to completely collapse, so that the club ends up in position not far off where John Daly ends up. I don't speak French, so I don't know whether Stephane teaches this or not, but all his students seem to do it. I have a couple of big problems with this:
1) Again, like Wilson, this creates a huge timing issue. It's Wilson's move on steroids. I must say, though, that my contact with this swing was REALLY good, and I was hitting the ball a bit longer than usual. However, I want to emphasize the phrase "a bit" because the gains I was experiencing weren't worth the control issues it introduced. Many of my tee shots went a long way, but a long way off line.
2) Of greater concern to me was the pain that the swing introduced. I attempted Wilson's/Triangulaid swing for a couple of rounds, allowing the front arm to collapse. Not only did this create control problems, but the strong snap of the elbow that occurs as the arm straightens has created a tremendous amount of elbow pain for me. In fact, I'm lucky the year is over because I'm sure it's going to take a month or so for this to repair.
Am I missing something, Stephane?