from an installers point of view these are the advantages/ disadvantages of the tsop flash
you want your xbox modded, we can do it right now, no ordering a chip and waiting
no additional cost of purchasing a chip
will perform identical to most mod chips
can be disabled on version 1.0, and 1.1 (which is the majority of xbox's I see)
once you understand how to do it and have done a few it's much easier and quicker then installing a chip
there are fewer/no wires to break or come loose or have bad solder joints
disadvantages
if you don't know what your doing you can damage your xbox and need a pro to fix it.
for the first xbox you do, you will have to lay out some cash to buy a memory card, a way to program that memory card, etc.
if you have a version 1.2 or 1.3 you will need to decide if you want to use live or not.