I worked from coffee shops as well for about a year right after I started my startup. It's definitely better than working from home; you get to be around people

I worked from coffee shops as well for about a year right after I started my startup. It's definitely better than working from home; you get to be around people and you end up being friends with other regulars. I rarely had issues with wifi, though. Which is one of the advantages of being in Silicon Valley. Depending on how many hours you spend there the ergonomics might be an issue. Coffee shop tables and chairs are not deigned for extended periods of work. If you're doing it for a few hours a day, then it's okay. I used to work 10am to 10pm, so it gets tiring after a while. Now I'm renting a desk space in co-working office in a great location in Mountain View and I can't be happier. It's not expensive at all and you get to be around other startup entrepreneurs and learn from each other. It's another great option to try if coffee shops are not for you.