This set was a bit disappointing the parts weren't labeled so you know you are getting the parts in the right place. I was able to figure this out through years of soldering experience, but this board is not good for those trying to learn soldering and know little about components. I am an instructor and ordered these kits for staff training. for soldering surface mount components. I liked that we could check the chart for accuracy, . When the scoreboard lights up, we know they did everything right. My board really caught fire! Although I missed the SOT-23 components, they do not belong to the functional part of the board, so they are not critical. They would just be more convenient for placing multi-pin components. All in all, this is a fun set. All I have to do is mark the pieces and hope none of the components get lost, as for most components there are no addons other than 0402 that are the easiest to lose.