I understand you're looking for a review of a "Google Installer" tool for MIUI 12.5.5 on Android 10. However, I must clarify something important first:
These tools are third-party hacks often shared on forums like XDA, Telegram, or file-sharing sites. They try to force Google Play Services onto Xiaomi devices sold in regions where Google services are banned (e.g., China/Hong Kong ROMs).
If you still want a neutral, proper review of such a tool for your specific device, here’s how a genuine user review would look — including warnings and real experience: Device: Redmi Note 9 (MIUI 12.5.5, Android 10, China ROM)