The ability is very good, it's easy enough that even an average user can configure them without any problems at all! It has many plugins which are useful in daily work with travel agencies (eBooking system). I think there should be more customization options available such as adding new fields or changing existing ones by users themselves - this would make our life easier when working together online! There aren't really anything negative about nemotravel so far but if you want something better than other providers then just try different things out until your find what works best according yoour needs/requirements & budget constraints etc.