If you are looking for a "solid piece" of software to make this device run smoothly, you are likely looking for one of these two community-developed projects, which are considered superior to stock manufacturer firmware:
A. ATV Experience (ATVX) v2 / v3 This is widely considered the "exclusive" gold standard for older Amlogic devices. It mimics the Android TV interface (like on a Nvidia Shield or Sony TV), removes bloatware, and optimizes performance. r29 mxq lp3 v23 firmware exclusive
B. Armbian (Linux) If you want to use the box as a server or mini PC, Armbian is the only "solid" option. If you are looking for a "solid piece"
Device: MXQ Pro / MXQ-LP3 (Amlogic S905X/X2 variants) Firmware Version: R29 V23 (Exclusive Build) Verdict: ⭐⭐⭐ (3/5) — A mixed bag of performance boosts and stability risks. Before flashing anything, you must confirm the Device
The terms r29 and lp3 usually refer to the board revision or the DDR memory type.
Before flashing anything, you must confirm the Device Tree (dtb). Flashing the wrong firmware will result in a "brick" (a device that won't turn on).
So, what makes this version "exclusive" rather than just an update?