I have had three Bostons (all came for a breeder who shows them) and one had a litter of 5. I had her bred to a little CH in simi valley. They are wonderful little dogs. They will play and play and play as long as you want, but are just as happy vegging out with you whenever you want. I've never had one to slobber, or be so strong they can pull you down, but I've seen really large ones that are not of good breeding that are like that. They are wonderful with kids of all ages, smart as they come, easily trained, no doggie odors and super easy to take care of. The one thing you have to be aware of is they pass gas.......and can clear a room sometimes.
They love to sleep with you and go right under the covers. They need sweaters and jackets when the weather is cold. They only shed a minimal amount if they are getting the proper diet and Omega fatty acids.
I highly recommend finding someone who shows these dogs and see if you can get some information from them and maybe even see their dogs and puppies before you ever buy one. Go to a dog show if you find one showing Bostons, and talk with the owners there. I very highly recommend this wonderful breed!!