Equipage--best feature I found was the position of the transmitter--under the mare's jaw (upper ring on the halter) and not lower down.
My friend has the Foal Alert (older one) and the units are larger and heavier and always seem to be in the way when the mare tries to eat or drink. Her barn has permanent feeder's attached to the stall walls and the mare's tend to get the foal alert caught on the rolled edge of the feeder (Not CAUGHT CAUGHT) but always bumping them until they realize they have them own.
I like the battery backup on the Equipage also, in case there is a power outage it will continue to operate for I believe 8 hours.
Another nice thing--the pouches are washable and not leather. After foaling season I take the unit down (leave the antenna up on the barn) clean it up, take the batteries out of the units and pager, wash the pouches and store everything (transmitters, pager, and covers) in a plastic bag along with new batteries for next year and when foaling time comes around it is ready to go.
One feature that it has that I didn't take advantage of is it's phone dialer. It will call several numbers that you input if you go next door for a few minutes or if you have a neighbor on standby if you work--it may cause some false alarms but better than having no one there to watch them--just set the dialer to call your cell phone, a neighbor, or you vet and in what order to dial.
When I bought mine at A Nationals several years ago, they had a special where you got and additional transmitter or the phone dialer at a discount price with the purchase of the system. I got the second transmitter. I hope to purchase another transmitter later this year and for the first time I can see when having the phone dialer could have been very handy this year so may invest in it as well.
Would not trade my Equipage for anything and it paid for itself the first year--I would have lost a mare and foal if I had not had it.
EQUIPAGE A+++ in my book