I used a Line6 HD500x before the POD Go, but had got to a point where I was considering individual pedals, or the POD Go (went through the same process going from the PODxt Live to the HD500x). Costed up choice pedals, tuner, a PSU, a board/case, patch cables, etc. and came to the conclusion that the multi-FX was the way to go for me.
If you factor in that if you bought say 6 pedals, you may need to replace 2-3 because the original choices may not work out for you and be replaced. GAS plays a role too.