Share 'Choosing a treadmill: Horizon Evolve SG?'

I am a petite woman and prefer a treadmill that I can move by myself. I liked the Horizon Evolve SG because it's so compact and shipping is included in the $600 price, but I have two questions if anyone has experience with it: 1. How does it hold up over lots of walking time? Is it comfortable to walk so long on it? 2. The upright piece is solid and looks fairly high. I was thinking of getting a…