Hi myself have dealings with Pokerbility and have found them a great company and their calculator can be great for beginners, personally though I do not need it, however when I first began playing Online poker my girlfriend bought me a poker calculator and in the beginning it was fantastic as it helped TEACH me what the odds were also to make the right descisions. After using it for 3 months I not only increased my bankroll but more importantly my poker skills at calculating odds. So for all those that poo-poo it, you should consider the new people and how it can dramatically improve not only their game but their skills