I loved the TV series, I have watched it litrally 21 times. Havn't read the book, to busy reading 'first three minutes' (which i must also say is an interesting book on the origin and 'evolution' of our universe). But i did see in the Doccumentaries (Elegant Universe) that it was a bit dodgy (but most of it was alright). For example, in the second episode, strings the thing, it mentioned that the other 6 dimensions were wraped up and were really small (Calibu-Yau). But in the next episode it was implyed that these dimension were now massive (by saying that the membranes were floating in higher-dimensional space). This was most mis leading. It also mensioned that gravity was leaking out of our membrane, which is alright, but, theories proposed by Lisa Randall (Harvard professor) say that gravity is leaking off of a nother brane. This theory (Lisa Randalls) is believed to be more 'persuasive' so to speak as it explains more things (not to go into detail).
Also I found it interesting that it had not mensioned that we cant see these huge dimensions (in reference to the membranes and large dimensions) because the photon is chained to the membrane but instead said that we cant because we are linked to the brane.
Any way, does any one actually think that string theory is right (or on the right track). And who believes that the dimensions are on the Calibu-Yau or are super large?