Its up to personal choice mate. That's what I said. B'cos I had experience on both ways.
I have done as follows:
1. Injectors cleaned/replace if necessary (Using Wurth)
2. Spark plugs checked and changes (Cleaned)
3. ISCV cleaned (Cleaned)
4. MAF Cleaned (Cleaned)
5. Change air and petrol filter (yes air filter but no need Petrol filter)
6. Clean EGR (yes)
7. Reset ECU after the tune up (Done at home)
Last Year, I have done a manual tuneup. But didn't change any performance and there was a RMP issue with my car (when switch on the AC). Now it has solved after this tuneup. I didnt say, manual tuneup is not good. But removing injectors again n again, its not good for the vehicle. ahh?
Using manual tuneup we cant clean full system at once... But using this (running with some FUEL INJECTION CLEANER), we can do it..