I gave this a try for a few queries, but the results are very varied. Often you get the landing page for a study with its PDF behind a research/journal paywall

I gave this a try for a few queries, but the results are very varied. Often you get the landing page for a study with its PDF behind a research/journal paywall (even with the "Free" filter applied, so not sure what "free" means to Google). Sometimes the "dataset" is some kind of visualization without any obvious way to get the raw data. Only a couple of results had a JSON or CSV to download. Overall a bit underwhelming.