Both the museum and the attached shop is interesting and full of books, music boxes and other particular things. They are perfect if you want to buy a gift to someone who is passionate about Sherlock Holmes' stories. You can enjoy the shop even if you don't buy anything. The museum is not very big and a bit expensive maybe but it is impressive and I personally enjoyed it and took many pictures there. The surrounding area is beautiful as you can go to Regent's park, which is a wonderful park in the middle of the city. If you come to London I would definitely recommend a visit on Baker street.