The 3.5" cheapie packer. Yes, it's pink (and hideous). But a) the price is right; b) it can easily be converted into an STP (vids on youtube); c) when warmed to body temperature and powdered lightly with cornstarch it FEELS LIKE A REAL SOFT DICK.
I wore it with tighty whities which kept it in place nicely. It has nice balls on it. The longer cheapie squishy dicks have flatter balls, and makes them hard to keep in place without some sort of harness.
For comparison, I had a LJ cherry packer and it was heavy and firm and inflexible; I have a Mr. Right and agree it is difficult to pack with; the packer from FTM Prosthetics in Australia felt good under clothing but felt more rubbery despite powder (not to mention it was expensive); it was also a bit larger and more bulge-producing. The Like Real small uncut packer is nice if you're looking for one to glue on, but it may not be as easy to convert to an STP. It's not worth springing for the urinary system.
Yes, I have owned just about every packer out there. And look where I ended up! LOL
Jay