Started the p90x program, used a cheap set of adjustable dumbbells, spent more time trying to adjust then able to work out. Bought the select tech and love they way they are easy to adjust, wide range of weight, no fighting to get the weights off the stand. Haven't found anything that I can't do with them yet.
Pros: Compact, Durable, Easy To Use, Multifunctional, Targets Muscles
The real tradeoff is number of dumbbells versus a bulky weight. If you don't mind bulky you will save a lot of space. and money. It is not sturdy at all. Be careful not to drop it even from small heights. The weight clips are plastic and will break. Every weight targets muscles depending on how one uses them so do not expect special muscle targeting features from this weight either. It is very easy to set your weight and it does not feel flimsy. The uneven loading may come in handy for some exercises. Get the stand. It is easier on your back when fully loaded.