Well, my first post... hope this helps. I'm writing this because of the real LACK of good reviews that give the type of info that we need as modelers re: these brushes. This is one reason I have so many brushes- had to find what I like and what works.
Yep, I have a CS, along with about 3-4 other iwata brushes (CS, CH x2, BH, SB, CM-B), a couple badgers and an old trusty Paasche H. The CS is good for generalized work, and ideal for good surface coverage where you are spraying thicker media. For really tiny stuff or super fine lines, it won't be as good as a HP-C or B/SB.
If I were you, I'd get a HP-CH. Does everything that the CS does, but can handle tighter work, more finit spray and has air control on the brush.
One thing: it may seem that you have to choose between all these iwata brushes, and that a bunch are needed to do what you want to do. The reality is that the functionality of these brushes overlap. Here's my take:
CS/SBS/BCS/BS- all pretty much the same gun, just different paint storage methods. 0.35mm nozzle, and can change out for a .5mm cheaply so you can spray thicker stuff. Floating head, not the screw on nozzles like the others...). The gravity feeds are great for control- paint on demand, can spray at lower pressures = greater control, smaller lines, less overstray.
CH/BH- both top feeds. The HP-C/CP/CH is a good overall brush. I'd recommend the CH as it comes with a present handle and a mac valve. 0.3mm standard on the CH, 0.2 on the BH/AH. You can still spray VERY small lines with the CH. Gravity feed = control. You can get good coverage with the CH with enough pressure and
SB- I fretted a long time over this, and now it is my brush of choice. Side feed. I thought initally I wouldn't have control but it is very responsive, but it feeds such a small amount of paint into the barrel that you get a lot of control. I can normally spray thinned paints @ 5-7psi on my silentaire without a problem and get SUPERB control. I guess this is why illustrators used to use them so much? More of a speciality brush b/c paints need to be thinner. You can also look over the barrel.
CM-B- what can I say? The MOTHER of all brushes for detail work (really, there are a few companies in the world that produce some good brushes, but these are great...). I've done some VERY detailed work with these. Hair thin lines. BUT- you can only spray VERY thin paints. It is a specialty brush.
One last note: consider an SBS if you want to get a CS. They can accept 1-2 oz bottles on the side for spraying a LOT of stuff. You can also look directly over the barrel. I'm likely going to be selling my CS, which is geared with a .5mm nozzle, and replace it with a SBS b/c I like these so much.
Hope this helps!
p.s.: re: lines- Again, I'd get the CH- it's more, but you can mailorder it or get it off ebay for ~ $60-80 more, and you'll be much more pleased than working with the CS. You can spray THIN lines, like pencil thin, with a CH, but I warn you- it takes PRACTICE, and having the right type of airsource (tanked, regulated, spraying at <15psi). Using an AB is like any other brush/tool, and takes practice to get the effects you want.
You can see how thin these spray by looking at some sample photos- the company puts a card with the spray pattern in each package. Go to ebay and take a look.