The ability to create custom fields without having programming knowledge was very helpful when I started working as our Content Manager/Editorial Lead - it made my job easier! We were also pleased how quickly they responded once issues arose during implementation (which wasn't often).
Nothing really stood out but everything was fine. Great product overall - if used properly there shouldn't have been any problems encountered along the way. They did what their quote stated, which is not always true; however, this didn't affect anything negatively because all expectations were met or exceeded.