This may be very convenient but it will also be VERY expensive.
I did a cost analysis several months ago of my GliderKids Staple and the fruits and vegetables that I feed with it. The total cost for a batch of the staple and the wide variety of fresh and frozen fruits and vegetables I buy came out to $27 for 2 gliders x 70 days.
If you use ONE Jar per week at $9 per jar - you would spend the same $27 for only 21 days (3 weeks) - if the jar contains enough for two gliders to last a full week.
If you accept that the label indicates that this is all you need to feed your gliders - the 12 ounce jar may only last 5 days if you feed 3 TBS per glider each night. If that is the case You will probably use 3 jars in 2 weeks
I am not sure I would trust an open jar of the food to remain fresh in the refrigerator beyond 5 days any way.
It will not provide a wide variety of fruits and vegetables.
Your gliders may become bored if offered the exact same plate of food each night.
This is a new product - none of us have experience in long term use of the product to keep gliders healthy.