I use this pga03 ybox to split my guitar to two amp heads and this box of magic is fantastic. There is no loss of signal and it is a a solid piece of kit; there is no chance of it falling apart or letting you down. The jack connections seem pretty high quality and it has good battery life. The phase reverse and ground lift functions are handy as well.
The pga03 is great and looks cool too with a nice blue finish.
What is great about the ybox is that there is no humming or buzzing, it is one of the best signal splitters out there.
This is my favourite tool, it allows me to run two signal chains, going through each channel of my compressor to both my amps. It has a solid built metal casing which after a year is still in as new condition. Runs on batteries or a power supply and mine came with a few palmer plectrums, which aren't bad in themselves; chalky feel and a decent thickness. This is far superior to a y cable or similar, only downside is you can't switch between each output like an a/b/y however for my needs this isn't important.