How are CHEAP ballast bags?

I have been wanting to get some more fat sacs for our Sanger V215, but before I blow my money on them I wanted to get some opinions on the different brands.
Of course some of the better ones like the new Ronix bags and FlyHigh should be more reliable... but really how much more reliable or "better" are they???
I really just want more weight. I don't need any fancy features. just looking for the best weight per dollar ratio that won't leak into our boat. So with that said, lets hear some opinions. Thanks!

Here are some links to cheaper bags that I'm looking at.

AERIAL 350lbs - $39.99
http://www.h2osportswarehouse.com/bo.../bb-aer350.htm

FREE MOTION 540lbs - 79.95
http://www.the-house.com/fmsing54015...last-bags.html

BIG BAG 540lbs - 99.99 or 2x 540lbs - 189.99
http://www.the-house.com/wkslbgb5401...last-bags.html
http://www.the-house.com/wkslbgb540t...last-bags.html

I have been issuing the big bag 540 set and they have been just fine. No issues at all so to me that's pretty much as good as it gets!

Free motion and the Straight line are the same bags. I've had good luck with them

I think I'm gonna have to buy that aerial 350. Too cheap not too

The big bag is straight lines less expensive model it is made with thinner vinyl. Having said that I have had both the big bag and the sumo 900. There is a noticeable difference in the vinyl however I really like the big bags as they are easier to roll up and store because the vinyl is less rigid. It has been great for me just make an effort to be more aware of what's around you as far as sharp edges or objects to avoid chances of cutting the bag and you should be great. Also one thing to think about is that a sumo pump won't fit fly high bags without adapters. Just a heads up from personal experience.

I had a set of those aerial bags. I didn't really like them. There's an internal bladder and then the external protective part. I always had trouble keeping the fill ports on the internal bladder lined up with the opening on the outer part. The fill ports are like waterbed fittings with a plug then a screw on cap. I couldn't ever get them on or off without spilling a good bit of water. I think I used them for a month or two and then got rid of them.

yea those older bags will use different fittings. they're ok as long there protected from sharp stuff

Big Bag 540s worked well for me for 3 years. I sold them to a dude that still uses them. I even had them hooked up to the plug n play in my Axis.