Oh yea, something I know about!
Pee pad training was sooooooo easy for "us" but I am a lucky stay at home Mom and I think that makes a huge difference. The secret is limiting their space so they really
can't have too many accidents. Shelby has an expen with her bed, food, water and pee pad inside. Pups go on the pee pad most of the time (especially if their choice is pee pad or hard surface like tile) if they are in a pen. When you catch pup going potty in the right place praise and give a treat. Tell her "good potty" and she will start to understand. As you see her making progress... give her more area....like a kitchen floor that is gated off, with the pee pad in the place she is used to. (that you will NEVER move) Continue to make a big deal out of every good potty and say NOTHING when she errors.
start trying to encourage her to good potty on command when you see she is learning.
I "knew" we were on the right track when I was heading downstairs with Shelby and she stopped at the top of the stairs and ran back to her pen to good potty.
Now shelby will do good potty when we are out on the grass...because I tell her she can. If you want them to go outside more, take them out first thing in the morning and use your command to go.
2 hints. Clean up every mistake they make with a cleanser that will get the odor up or they will go back to that same place. Also pick up area rugs until they get the hang of this.