I have it and love it. It has crazy long range, and has no problem transmitting through buildings. I like how it confirms all of the actions. The remote tells you when the engine is running, doors are locked/unlocked/ or ajar. If you are in range, It will beep and vibrate if somebody is messing with your vehicle.
I'm pretty sure it will work with a manual tranny. It just takes some extra work and wiring on the installers part. It taps into the emergency brake, I think.
I got the alarm on Ebay for $230 I think. The labor was about $200.

It took a professional installer about 6 hours to do it, but it was worth it. They had to add a transponder to fool my Taco's Engine Immobilizer security deal. The transponder was an extra $40.
The remote can take a little getting used to. Because of the 2-way action, there is a delay. You have to push the button and then wait a second or two for the truck to confirm the action. Because of the delay it's hard to program and adjust the settings, but once they are set, you're good to go. My installer used a special plug-in programmer to do it all.
The remote goes through batteries fairly quick. I replace the single AA about once a month. No big deal though.
I really like the 2WSS-AS, and would certainly buy it again. But unless you really need the 6000 ft. range you might want to consider the 2W900FM-AS