OK, I did a small test today. Participants: 1,5m PFA on polar mount moved by positioner, DM8000, Sathero meter, FS1 meter.
I took signal level in % from Sathero and DM8k, but from FS1 in dB. All three times approached Hotbird at 13*E from East to West, and made lock on 11043V 27500 ¾ channel Rossiya24 FTA. All 3 participants locked signal at positioner's position 554, got their maximums at positions 547-544, and lost signal at 535.
BTW FS1 lost signal in position 536. On Sathero I got maximum of only 90%, sometimes it was blinking 91%. Maybe I can get more on other transponders (did not try it yet). Put data in one table (attached).
My personal verdict: Stahero locks signal pretty easy, scale is dynamic enough, and, I think it is possible to tune antenna with help of this toy. Costs only 33 bucks including delivery - cheap. Pocket size. Easy to change satellite and frequency plan. Possible to attach external power or use receiver. I like it.