1/2 cordless impact opinions

I've had a M18 Milwaukee 1/4 inch impact and 3/8 inch hammer drill for about 6 years now, bought them after seeing the Dewalt tools that co workers were using that were problematic. Only problem I've had was brushes on the impact needed replacing after 3 years of heavy daily use, cost me about $70.00. The thing has taken a ton of abuse and never failed, planning to get a 1/2 inch one in the near future.