Overall, this is a great stroller for a medium sized dog. Our larger sheltie is 42lbs and about 35” long when laying down and he fits perfectly inside.  Was easy to put together and it rides well.  Would have loved rubber wheels vs plastic and the push handle feels a tad flimsy (fingers crossed that it lasts).  We wheel this right up to our back stoop and our dog can walk right in easy peasy. He has an ACL tear, so it’s been great to get him out on walks again. I think he is really starting to enjoy it.