Futaba has over 17 years of history with 2.4 Ghz in

comercial applications before using it in hobby radios.

I have owned JR and Futaba radio equipment and have had good

results with both brands as FM radios.

Was out of the hobby for awhile, when I got back into it I did some

research and found Futaba had the fewest issues with 2.4Ghz so

I went with that.

I think most issues are with human / user error than equipment problems.

Spektrum is I think aligned with JR.

I would go with what ever equipment has the features you are likely to use.

I also had warranty work (broken antenna) by Hobby Services for my Futaba
was quick and no hassles.

As to who sells the most? I can't say.

Happy flyin', Oscar