I've demoed their new system as a beta tester and I can tell you that it's very svelte. I encourage everyone, TLM or NO to check it out. It is a tremendous tool. Our parish won't be subscribing just yet because we do not have any singing by the congregation; we currently only have a small schola (now on furlough for 2 weeks due to a c19 situation...).

The system really is amazing, though, and you can set up all your ordos with music or text, round or square notation, choose transposition and verses, etc. etc. and then share it digitally or export to print or complete further edits in another program. It's incredibly powerful and I honestly believe it will be the future of liturgical music planning, at least for NO parishes, although I believe it will become more and more useful for TLM communities as they add more and more chant.

I looked at it and availed myself of the free month trial in August. Not all the advertised features were operational at that time, but I concluded it was a very expensive annual subscription service (that will increase in price in future years) for music that is in the public domain except for the Illuminare chants, and I don't need the digital planning/printing/formatting/sharing features.

Besides, my OCP parish isn't ready to give up its favorite music. Earlier in the year I got the parish off the annual Breaking Bread subscription in favor of a hardbound hymnal. That first step was to get away from the "we need to subscribe to get the new music" mentality. I'm averse to any subscription-based music service that attempts to make you dependent upon its ecosystem and that makes you pay each year for music you already purchased. Even worse to pay each year for public domain music.

Source and Summit may be a good service for parishes that adopted the Ignatius Pew Missal. It seems to me to be a superior, more flexible version of what the IPM offers, and I think Ignatius Press should be worried that Source and Summit could drive the IPM out of the market. But Source and Summit's musical repertoire constraints would not be received well by my OCP parish, just as the Ignatius Pew Missal's repertoire would not be received well.

@MarkB: Did you see the product roadmap, for what's coming down the pipeline?

I enjoyed the 30 day trial, but why is it so expensive? 800$ a year?

Hopefully it's because they're paying their employees a living wage, and properly compensating the composers and rights holders whose work they use. Not to mention equitably compensating the developers of the very powerful software they've developed to make easier the publication of worship aides.

I'm not familiar with their pricing structure, but the number you quoted is $15 per week, and I have trouble believing that even the very poorest parish couldn't afford this (as long as they valued what they receive in return).