The so called safe strippers are only safer because they have a low evaporation rate so you don't breath as many fumes. The actual material is toxic. You wouldn't want to get any in your mouth or have pets or small children around when you are stripping.
Dipping furniture will not ruin the glue joints. This myth comes from the days when hot lye tanks were used to dip furniture. Hot lye can definitely loosen glue joints. It does have its uses though. Some problems may come from dipping if a water rinse is used. However, you would get the same problems with hand stripping followed by a water rinse.
The safe strippers have alot of water in them. This can cause grain raising and loosening of joints and veneer since the stripper needs to be left on the furniture for quite some time. Since the "safe strippers" are toxic, they need to be disposed of properly.
Peel Away has some caustics in it which can darken some woods.
I am very skeptical about the sanding blocks. Seems like more infomercial lies. Also, don't be fooled by QRB or other so called easy refinishing systems. They consist of nothing more than what you can buy in your local hardware store for alot less money.
A good source for furniture stripping and refinshing is Bob Flexner's book, "Understanding Wood Finishing."