I have been using Higher Gear for the last 6 years, and I can honestly say that the customer service is strong. I'm familiar with other companies as well, but can safely say that Higher Gear is the quickest in customer service and support, and the CRM itself is easy to use for everyone. Any Sales Manager I have ever spoken with has prefered Higher Gear to any other program as well. As I said, I personally have used Higher Gear constantly for the last 6 years and continue to use it because we are all happy with the level of customer service and strong userablility.
I agree completely with Don and Directorboyd on their assessment of Higher Gear. I think the strongest thing I can tell you is when it comes to customizing or making changes, they make it happen quick. To give you an idea, others that I have experienced take 1-2 weeks to get things done, but Higher Gear has always done things in 24 hours or less. All in all, you can't go wrong with Higher Gear.