Pros
After reading the reviews on Glassdoor, I declined to return the recruiter's emails. A friend who had worked for a Vista owned company talked me into talking to the recruiter. She said that Vista often comes in and changes things and people understandably get upset. I'm glad I went through the interviews and now I work at Taxware. The company does a great job of on-boarding and training, with continuous training available so all employees are exposed to best practices and concepts. Teamwork and (for real) positive atmosphere - everyone wants to make the company better and are willing to work together to make it happen. Good cooperation across different groups. Work life balance is good (surprising for the size of the company).
Cons
The company was pulled out of ADP and is basically starting with very few tools and assets. Groups are trying to improve the product and build sales tools at the same time they are trying to improve customer satisfaction. There is a lot of 'challenges' left over from ADP or just after ADP days. But as I said above, everyone is in it together.