Extensivley debated across many posts in the "Study Support Forum"

This is a discussion point on may Forums not just this one.  The simplist answer I would offer is that it depends on your lifestyle, learning styles and what you want from your qualification.  I personally went with NCRQ as I found that style of learning suited me.  If it a promotion or certain role then look at the adverts and see what it is they are asking for and make your judgement on that basis.  They all have their merits some are in my opinion wrongly seen as being better than others and at the end of the day I would always be looking for a blend of qualification and experience.

Good Luck with what ever it is you decide to do