I visited the Passionists Nuns in St. Louis for a day, while I happened to be down there, and really liked them! Mother Mary Veronica and the Novice Mistress, Sister Mary Salvador were extremely welcoming and kind, very easy to talk with.
From speaking with them and reading their literature, I felt that the community was pretty austere in their observance of the life, but very very joyful at the same time, which usually goes together.

They rise every night at something like 2:00 am for a half an hour of meditation and the Office of Readings, and then go back to sleep again until 5:30 am or so.
Just a small note, but the Passionist Nuns actually never had wimples as part of their habit/veil - so they are definitely in full Passionist habits and everything - not that that's a very big deal, but just to let you know. That's a great picture of them shortnun, from your blog! Yes, there are a few young ones. I believe the youngest one there is Sr. Mary Elizabeth.
Another picture I found of them online

Sr. Mary Elizabeth, Mother Mary Veronica (I think) & Sr. Marie Michelle
Every Sunday they have the TLM / Extraordinary Form of the Mass offered by the
Canons Regular of the New Jerusalem. Their public chapel and monastery is pretty small, built around the 1950's I believe, but nice - fits well with their charism.
Here's a little something on
St. Maria Goretti & the Passionists. Yep, she's numbered among their saints.
And here's a beautiful story about
Sr. Marie Michelle's correspondance with an African priest.
I would strongly recommend them!