I'm biased as of recently but it's a no brainer, I struggled last year with a styrobator no names mentioned....and put dozens of eggs through it..seriously and got maybe an 8% hatch rate, shipped, local didn't matter..(don't get me wrong they may work for some people depending on ambient climate but not for me)so I bit down, swallowed and bought an RCom 20 and I just hatched 9 out of ten with eggs shipped 3000 miles.
.my only beefs are 1/ it's 1/4 inch too narrow to fit 21 decent sized hens eggs and have them all roll on the turner and not pinch but I improvised a narrow divider that's working fine for round 2
and 2/ the bottom is too slippery without the "unavailable in the usa" hatching mat but a piece of paper towel worked just fine at lockdown..no need to open it really apart from adding that hatching non slip part
the temperature that is spot on and I double checked it with my egg-o-meter for the first round. As for humidity it is within 1%. And you just have to add luke warm water every few days through the front well, if you forget there's an alarm....does it get any better ?
Yeah ok the inital investment is high but when you add it all up ( I daren't ) initial styro purchase, add a fan, add a turner, temp. And humidity guages cos you don't believe the readings you have....THEN throw the cost of 100 or so eggs in and you're right there
Personally I think there maybe a world explosion in chicken populations if this gets out !
Cheers