They are very honest to your needs and don't overcharge for it! The team knows their stuff, they work hard, communicate well and have loads of experience from other markets around the world so know what works best where you're located! I've used them previously as an affiliate manager but now use them more for my own websites.
Their support has improved enormously since we worked together last time - great people who help out quickly if things go wrong or need reviewing, quick replies when questions arise etc. For me personally this was just getting started using conversion rate optimisation services, working through some ideas / testing different approaches then seeing which ones were most successful at converting visitors into customers.