Well worth a read, even if you've seen the TV series, that will provide you with more information on Easy company, and will increase your enjoyment of the TV series if, make that when, you watch it again.
You might think that the written word will not come close to the impact of the images and sound of the TV series, but with "Band of brother", for me the best of Stephen Ambrose's books, he comes very close to matching that impact. Plus, with the luxury that the written word allows, provides you with far more information on Easy Company, how the harsh training under Captain Sobel helped forge the company, and the hardships it faced, and survived, during combat.
Remember, this is not a novel, but the recollections of a group of American soldiers, who present an American view of the war. If you want to read about other nations contributions to the war, look elsewhere ("Pegasus Bridge" where Ambrose attempts to do for the British para what he did for the American with "Band Of Brothers"), but don't blame Ambrose, and don't close yourself off to this book.
If you did, you would be denying yourself an insight into what makes soldiers fight, how in even the most inhuman conditions they can maintain their humanity towards their comrade, and the hardships they suffer for us.