Garage opener, phone, keys, wallet, Allen keys, and other small essentials all fit, and are easy to get at thanks to user-friendly zippers and also e placement, i.e. how the bag is facing you on the handlepost. Easily worth the money.

...Which is to carry my wallet, phone and keys, when I’m wearing basic gym shorts in this Florida heat & humidity. It won’t slip down the handlepost because of the metal peg location on the Physis 3D post of my Verge S8i, bit it’s snug anyway.

The RidePocket is nicely constructed, like my other accessories from Tern. I remain impressed with the fit and functionality of their cargo bags I have. A nicely integrated system, that suits my urban utility and recreational needs.

Very convenient storage bag, I use it all the time!

It's a decent and comfortable little bag, but if you want to use it on your other bikes, it's limited by the small straps.

This bag is a fairly well designed storage compartment for keys, wallet, and the like. However, since it is such an attractive prize it needs to be taken off each time you park your bike (at least in a city). The design doesn't really take this into account. The velcro strap is awkward to thread through the plastic buckle, and takes a lot of fiddling to get right. if the strap was even a half-inch longer it would work better.
If you can leave it on your bike all the time, it's a great bag. I'd recommend something with a better attachment system if you need to take it on and off frequently.