Just purchased the Wilson db pro from Amazon for home use and have it temporarily set up with the antenna pointing towards the tower and set in the 2nd story window and I already see improvement in my in house service. Please know that it will take an existing good signal and bring it down through your home. It will not turn a bad signal into a good one.
Before ordering, you may want to check how many 1x dBm you get on your cell phone outside, preferably on the roof where you hope to install the unit. If you already have crappy service there (high -90 or more dBm), a booster of this type probably won't help much with indoor service.
Carolyn