Sorry, I use google translate because my English is not very good. I'll try to speak in my own words, what I meant is that it's easier to solder a hwfly than a picofly which requires several solders (one on GND, one on 3.3v, another on the DAT0, another on the CMD, another on the CLK, another on the RST and finally on the CPU)
Sorry again, I'll have to proofread myself before posting.