Being propless is a big advantage, but it also have even bigger disadvantages (way bigger).

First of all, is not so simple as TH and therefore (as pointed by Mark himself) is not ideal for every audience (the ideal would be intelligent, sober non-aggressive people). TH don't have this problem. I can frame even drunk people in TH with no problem (I've done so). The "simple" also goes to the performer... you'll use more of your rational skills here.

Also, the structure is more limited... I can do TH with 20 people using themselves as marks for their answers, the same cannot/should not be done with SO. Ideally SO is to be done with 5 people. 6 or 7 need one more question... etc.

Next comes the price. When you think of advantages and compare the price of TH and SO, well, that's 3 reasons why it lost 3 stars to me. I had high expectations after TH, but since I already know a lot of staff about this subject, I was not as impressed (Ring Of Truth by Banacheck striked me imeadiatly when reading it and was not credited). I think Mark came to similar conclusions through different inspirations but it was not a an original solution to me, it was a reframe of something that already exists.

Another point that annoys me is the possibility of presentation and the power of the effect. TH can be much more impressive in terms of chances. If I do SO with 5 people, that's 1 chance in 5 to get everything right. If I do TH with 5 people, that's 1 chance in 32 to get everything right (50% for every person). Sure, the chances of SO can be increased if you add information to what they hold, but the same can be done exponentially in TH.

There are more limitations in SO. Every person must know the other roles... this generates the need of random questions to disguise the method when you're chasing, otherwise it will look like a logic puzzle. In my opinion SO cannot be compared to TH. I don't mind paying a lot for a single trick, as sometimes it is absolutely worth it. But this time it was not the case. Being a huge fan of propless mentalism and logic puzzles, I must be more careful next time. Mark, you let me down on this one.

This is like tequila hustler taken to the next level and cloaked with a patter that makes it impossible for just about anyone to figure out. Those familiar with logic puzzles may be a little unimpressed with the method, but the effect and the results ARE good! If you buy this you are essentially getting Tequila Hustler's secret for free!