I have the 300. Had it for 5 yrs and have only 1complaint about them. If your using it in alfafa, you will notice the leaf lose. It doesn't matter if your recrimping 3-4 hrs after you cut or the next day, you'll see the green leaves collect on the machine.
Does it crimp the stock every 1/12- 2 inches, yes. Does it dry the swath faster, yes. It definitely does as advertised. It sped up drying time 1/12-2 days over just a disc-conditioner in my situation.
Was considering selling it when i bought my dual conditioner machine, but decided to keep it for the wet yrs. Now my wifes cousin has used it more than I have.
Hope this helps.