I trained with both but tend to use NSI as they quality is excellent but half the cost of CND. Although there are lots of CND products i couldnt live without.....
This is actually not correct. There is a price difference that when measured properly does exist, but is certainly no where near the degree that some make out to believe. Heck, the difference in professional costs for maintenance products is pence. Those interested in CND cost per service can contact S2 for the new brochure that outlines this.
There are many cost factors to be looked at if price is the driving factor when shopping for a brand. The most important is your time. If a product takes longer to apply or requires more time and effort to maintain, then saving pence on the cost of application is a false economy because your time is far more expensive than products you use.
Ultimately the decision should be based on common sense. Use the system that meets or exceeds your expectations at the best possible price. Depending on how you work, a cheaper product may yield the same performance as a more expensive product, but this is not a universal rule, its a personal one (nor is it a limitation of either system, its usually one of the professional). Keep the choice in context to. For instance, a Ford will get you to the same place as a Ferrari. If all you want in a car is to travel from Point A to Point B, go for the Ford. If you want performance and style, Ferrari's are a pretty damn hot way go
So as mentioned, do your research when choosing brands, but don't short sell yourself by not looking at the big picture. Also though this has been mentioned its worth repeating: Brand vs. Brand questions on any forum will mainly elicit fans of either side voicing their preference
While this can be good to get some viewpoints, its only one method for researching your chosen brand.
Best of luck