Jackie's home is quite lovely with lots of space, an awesome shower and super comfortable bed. I also appreciate the good flow of A/C as it was super hot outside when we stayed at this property. You will hear foot steps if anyone is renting above you. It worked well for us in that the person above us was a night nurse and rarely home when we were, though we did get to chat with her a few times which was nice. Jackie does provide a lot of fans and sound machines to help drown out the sound.
If you're active I highly recommend Sloan Lake anytime during the day. The loop around the lake is about 2.5 miles with great mountain views. There are lots of people walking, running, cycling, rollerblading and/or walking dogs. I personally felt safest to drive to the lake but if you're more comfortable with an urban setting and like to walk, then I'd walk to 14th street and hook a left. That area is a lot nicer than Colfax with lots of luxury townhouses and homes that are new to the area. The Edgewater Public Market is a great place for dinner and a drink - lots of restaurants to choose from. Tennyson St. is also great.
Have a clear understanding about what things you may need to monitor while renting (e.g. the back gate and getting the mail).