It´s not like the loops... you can do a lot of different things that are not possible with loops... the Tarantula 2.0 is reliable, easy to use and conceal... there are some trick included on the instructional.. but you will come with your routines once you get to know it
Honestly, unless you're doing a parlor or small stage show. None of the ITR are really worth it.
I bought Defiance by Mariano Goni I believe, unless it was a video or something, I don't think it was worth the money or trouble... just my two cents...