Four stars for pure entertainment value, and one star for Mr. King's exuberant, ebullient & exhilarating storytelling. 
 I know you don't have much time to waste, so I'll spare you some trouble & give you directions to the place you should go to. Do read the brilliant reviews of this book written by Nataliya (ladies first!), Richard, Michael & Jeffrey, for they have articulated their views on it in words I feel cannot be bettered. (If they are on your friends' list, well & good. If not, just scroll down the GR page of this book. You'll find the reviews with little or no difficulty.) 
 As far as the book is concerned, I highly recommend Stephen King's first mainstream time-travel tale. An absolute page-turner throughout & King being immensely quote-worthy as ever, miss this at your own peril, 'cuz it's one hell of a fun ride. Two beauties, as I conclude - 
 "If there is love, smallpox scars are as pretty as dimples." 
 That one was a Japanese proverb, and this one's my favourite - 
 "When all else fails, give up and go to the library."