We just lived that nightmare...one thing I want to say is get some referrals first! The granite company we went through, we would
never ever recommend to anyone but it's done now & the finished product is just awesome. This particular company lacked in customer service & they also made a big mistake (they reversed the granite we picked out for 2 of our bathrooms) but they ended up not charging us for our powder room to make up for it.
Anyway, we needed 65 linear feet of granite in our kitchen & the undermount sinks were all free with this company (lots of places are doing that now), we had a breakfast bar added (a rounded one which looks like a half moon instead of the traditional breakfast bar) ~ unfortunately I have forgotten how many more feet that added. They did our master bedroom bath which (again forgot the footage) but it's a long counter with 2 sinks & the 'Free' powder room due to their error ~ price was just over $5,000. We chose half bullnose finished edge, which was a few dollars more per linear foot (usually most places have 1 free edge you can choose, & I believe it's the flat edge, but we preferred something different). Three people that worked on our project were fired, so if that tells you something of our nightmare.
I've had people ask me "would you do it again?" Answer is "definitely NOT!" The mess is absolutely incredible....the dust was in mounds (especially when they had to drill the holes for the faucet fixtures). Be prepared for it to cost at least $1000 more than expected because you'll be buying new plumbing hardware (well that alone could be over $1000 depending what you choose), you'll have to hire a plumber (unless you or your DH know how to install new fixtures & disconnect then reconnect the dishwasher.) You will have to eat out a lot (the nightmare of our choice of company was that it took them waaaaaay too long to finish the job so we had to eat out for nearly 2 weeks ~ which means $$$$$$ for a family of 4.) If we ever did granite again, it would be in a new home in which we haven't moved in yet!
Check the company out ~ I can't say it enough. I only checked with the Better Business Bureau & at the time I checked, all was well. It wasn't till midstream that I went back to the BBB to place my complaint that I found out this place was no longer a member in good standing due to several unresolved complaints!

Live & learn! If you're in the Detroit Metro area, please PM me & I will tell you who NOT to go with.
Good luck & the outcome will be beautiful if you can stand the gray hairs you may inherit during the process!