One of the special features of the S4 is that it's a portable programmer. However, you do pay for that. There are many other good non-mobile programmers around that are less expensive (besides the S4 we have a Hi-Lo ALL-11 and a an EE-Tools TopMax that both perform very well, but there are many others than these that work equally well) and I would suggest that if you don't need portability, choose something else than the S4.