Some versions of this machine are equipped with two hydraulic jacks that will raise the machine and the rail a bit to release the tie about to be removed, which is a nice feature if the tie is plate-cut or the rail has been crushed down into the tie. Other models have a spike driver and/or spike puller attachment, and some had a small hand-held tamper as well. This one appears to be the very basic model with none of those refinements. However, that is not say we couldn't add any of these features if we wanted to.
In my experience in using one of these, with four or five men, it was possible to change out 40-50 ties a day, and if you were only removing and replacing and not spiking, it was easy to change 100-125 in a day. As long as you are not changing several in a row, it doesn't hurt to leave the new ties unspiked for a day or two. We would often change ties for two or three days at a time, then go back and spike them all in one day. It's also very helpful to come along with the tamper and tamp the new ties before spiking them.
The key to doing this in a productive manner is preparation. Drop new ties wherever an old one is to be replaced, dig out the ballast from the end of the old tie and use a pick to loosen the ballast along each side. Then when you come along with the machine, you just have to yank out the spikes and you're ready to go.