You should, It is a pretty interesting experience, as they have left the ship as it is and climbing up and down all those steep ships ladders gives you a genuine idea of how the ships crew lived. I was surprised the Elf and Safety bods have been kept away, as some of the stairs are quite perilous. The IWM have done a great job I think.
It is quite expensive, and you need almost a whole morning or afternoon to explore her.
I pieced together another bit of my Grandfathers war service, on my visit. The ship hit a mine in the early days of the war, and he and most of the crew were transferred to HMS Hood. He was one of the lucky one who changed ships again before that ships last fateful voyage.