Is Working From Home More or Less Productive

At my job, I have the opinion of working from home 1 or 2 days a week. I'm trying to figure out if it's more or less productive for me to work from home, rather than in the office.

While I'm working at home I feel like I finish my tasks more quickly and more efficiently than I do in the office. But when I'm in the office and I finish my work, there is always work to be done. So the quantity of work I do is higher in the office with the same quality I always have. There are more distractions at home, TV, Dog, Guitars, Ect.. While in the office all I can do is surf the web… I feel like I have almost reached the end of it.

So here is my breakdown of the Pros and Cons
The Upsides of working at home are:
1. Quiet/uninterrupted work time: great for work requiring concentration such as systems testing, writing specifications & documentation, analysis and ANY writing
2. Save $$$ (gas, train, dry-cleaning, etc)
3. Avoid commute (time, $$, better for the environment)
4. Comfort: pajamas, speedo Jr.
5. Extra sleep (better health!)
6. Can run errands at lunch
7. Schedule doctors appts on telework day and take less time off work to get to/from and more flexibility to work earlier or later hours to accommodate such appointments
8. Schedule home repair and delivery – no need to take off work
9. Pets – not home alone all day
Downsides
1. A lots of Distractions
2. No Human interaction
3. Being able to keep your focus.
4. When you run out of work, you're finished… Good for you bad for the Company
5. Repair people coming, always causes you to loose your focus
6. Bed / couch doesn't make the better work environment
7. Phone Calls
8. You’re able to surf the sites that are blocked at work!
9. Naps, good for you bad for the company

What do you think?