cost of concrete grooving

I got some done yesterday. I had a thread on here ages ago. I was humming and hawing about getting it done. Got dairy cow cubicle slats done a month ago too. Got two five bay tank slats done . 18' by 75' total floor area area. Cut in one direction only ( cut across the slats, not parallel with the groove ). Cost €400.
I was apprehensive about doing it. I thought it'd damage the slat, taking chips/chunks out of the slat, but it didn't. These were gang slats. The gaps were narrow to start with. It didn't make any slit excessively wide i.e. wouldn't come near allowing a calves foot get stuck in it or anything like that. I wouldnt do them on older single slats I have though as they're too up and down and the gaps are already wide in them. the machine used had 6 diamond tipped wheels spinning on a drum, leaving each cut about an inch and a half apart I think.
It took a few hours only to do that area (a 48 cubicle shed ) and the cows were immediately way more confident walking on the slats. At the feedrail was where a cow would often go down by being squeezed by other cows and she'd slip. Now they all get so much grip that the pressure is sideways on them. A great job I think so far anyway. I better stop now before I sound like one of those paid infomercials on tv. Hope this helps,
CI

pm sent

How does it behave in the frost? Solve the slipping issue?
Is it easy to keep it clean or do the grooves always be full of much?