I use the washable ones from
www.piddlepads.com also and have for over 18 months.....and my original ones are still in great shape....I like the plaid ones in the 24 x 36 size best!! And yes - they are an investment at first, but completely worth it in the long run!
This last week we had terrible weather.....lots of rain, ice, snow, more rain and more rain....so our yard was too wet/muddy to send the pups out to potty...and even with 3 pups using them 24/7 (and we had 2 down by the back door and 1 by the front door)...we only had to change them out once a day...they hold that much and do not leak!! I wash them with detergent and the oxyclean for pets...and they come out with no left over odors!
I guess you can tell I like piddlepads products......maybe I need to be selling for them!!
PS...We also bought some of the smaller size pads recently for Captain's x-pen and they are a great size for this use!!