The method you choose depends on your budget and needs. Here are some options for ECU flashing and logging:

FT232RL Cable
Cost: $10 - $30
Functionality:
Port flashing with NefMoto.
Boot mode recovery by patching the serial number to match the Galletto software requirements.
Reading and writing EEPROM (requires boot mode).
Setup:
Requires a bench setup to connect to the ECU or keeping the ECU open and plugged into the car, which can be risky. Any mistakes could short out and fry the ECU.
MPPS
MPPS V12/13:
Cost: $15
Compatibility: Works well with Windows XP/7, but buggy with newer versions.
Functionality:
Port flashing.
Boot mode flashing.
MPPS V16:
Cost: $35
Compatibility: Stable on Windows 7-11.
Functionality:
Port flashing.
Boot mode recovery.
Reading and writing EEPROM (useful for disabling the immobilizer).
Setup:
Requires a bench setup to connect to the ECU or flashing the ECU while still plugged into the car. Any mistakes could short out and fry the ECU.
Kess and K-Tag
Cost: Around $80 for the set
Best for ME7.5:
K-Tag:
Some protocol issues with early ME7.1.1 ECUs, but should not affect ME7.5.
Includes a breakout harness and its own power supply.
Compatible with all Windows versions.
Includes pinouts for bench flashing.
Logging
Best Option: J2534 cable like Tactrix Openport 2 or similar cable.
Functionality:
Supports K-Line.
Works with logging software such as Vehical for data logging.
Each tool has its advantages, so choose the one that best fits your needs and budget.