I started reloading with one of these in .243 in a Rem.model 788 many moons ago.That thing made some of the most,if not the mostaccurate rounds ever put through that gun.

Pros:
inexpensive,can take anywhere,very accurate(in my case),only neck sizes brass,very handy if you are on a hunt some where isolated and can not buy ammo.Also you can whip out a box (20 ) of rounds in just a little while.

Cons:
no scales (The powder dipper is pretty good if you can repeat),have to have one for each caliber.But for $20.00 who cares.Limited to one paticular load.

JMHO but as stated above I think every reloader should have one for every caliber that they own just in case.If you buy a complete set of the lee powder dippers you can experiment at home and get the right combination for different loads in the field,But then you would have to resight the rifle.
The worse thing for me in the beginning was the thought of beating on a bullet with a hammer[]........LOL Go ahead and get one you just might be surprized at the results.