Sending money home is a monthly thing for me, like for a lot of caregivers, so I've learned a few things the hard way.
First, the advertised fee means very little. What matters is how much actually arrives in pesos compared to the real exchange rate that day. I keep a note of it every month, and the difference between services was bigger than I thought, and it changes. The one I used in my first year was the worst of the three I compared later.
Second, a fixed amount on a fixed date helped my family plan and helped me budget. Before that, I was sending small amounts whenever someone asked, and I paid a fee each time and never knew what was left for me.
Third, and this is the part nobody talks about: it's okay to say what you can afford. For a long time I sent more than I should have because I felt guilty for leaving. My mum was the one who told me to keep something for myself.