I bought GTrain a year ago when my 20lbs mix was diagnosed with a ruptured disc in her neck. She loved hiking and I couldn't imagine her life without adventuring with me. GTrain made that possible. A shaped, sturdy bottom that she wasn't flopping around in, harness clip to secure her in, framing poles to keep shape, and room for moms snacks. It made a hard experience a little better. We love it. 10/10