Lightspeed is the greatest thing since sliced bread when dealing with large databases (anything over 200 Gb or so). It is a lifesaver.
Like all lifesavers, Lightspeed is expensive in terms of the check that you write, but when you consider what it does for your overall operations cost it is actually
VERY cheap. What you save on disk, time, and associated costs will pay for LightSpeed many times over.
Like all tools, there is a point below which the cost of the tool exceeds its value. If you want to balance your checkbook, LightSpeed is overkill. If you want to do an ERP system or a data warehouse for a decent sized company, then LightSpeed is cheap.
-PatP