The GM-15 Pro which is the same as the GM30 is an awesome cheap HT and here is why almost everyone in my GMRS group uses them.
1. Repeater Capable and programmable on the radio.
2. Easy to use and the Baofeng lady explains things in the menu so they make more sense.
3. Sounds good, the speaker is not the best speaker ive heard but its better than many of the other sub 30$ HTs.
4. Basic Power Meter on receive.
5. Good range and the amazon pack includes a ABREE AR-771 type whip and again the pack is less than 30$.
6. Can listen to FM Radio and 2M/70CM Ham band
7. UV-5R programing cable works on it (again more below).
8. USB C Charging and good battery life
9. Convenient Wrist Strap and okay belt clip.
10. Light up buttons (GM15 Pro only?)
11. Easy to remove antenna and good spacing to fit pretty much any aftermarket antenna or adapter.
12. Pretty good manual
13. Sync allowing you to see channel names and freq on the display at the same time
14. Dual monitor is available if you like that.
15. NOAA weather channel scanning automatically
Things I do not like
1. Biggest issue for me is that its not Dust/Water Resistant.
2. Saving per channel CTCSS/DCS sucks on the radio (but not completely impossible with help of Baofeng lady's guidance)
3. Belt Clip is weak and attaches to battery.
4. Battery has 3 pin charging on the battery but no base charger included or sold (why? Yes it has USB C but base chargers are nice. Maybe another base fits but idk which one.)
5. Not CHIRP Compatible and seemingly no plans to be so from Chirp
6. GM-30 Program needed to program it as Baofeng never released their version of the programming software. (My Cable required me to find some drivers as well for it to work on windows 10 and 11 tried both and then settings in device manager needed to be changed to compatibility modes).
7. Its a typical SOC GMRS Radio (but who cares at less than 30$).
So for using it around town and at the farm it works well. It is is cheap and we have talked 30miles+ house to house on these with really good clarity.
If you want to mud wrestle with a radio this is not it. If you drop things in your toilet this is not for you. If you talk mostly simplex and like to carry your radio around and want something better than a midland bubble pack or a basic baofeng this is a good option with lots of options on the radio.
Overall Id give it a B+ for a GMRS Radio there are things I wish it had (at least a little dust resistance) but most of them have solutions.
