I can't say enough good things about the PR-2. I have four Sony UWP wireless mics with Countryman lavaliers, and none of them sound as good as a PR-2 with the Wlav Pro. Not to mention, the PR-2 has internal timecode, so if you use a TC-1 on your camera, syncing the files later is a breeze. I don't even use my PR-2 in 32bit float mode, I just use the 24 bit mode and it works fantastic. The Wlav Pro is a mic that outputs great level without a ton of bias power necessary to do the job. I tried a Countryman B3 and B6 on the PR-2 and they didn't get as much level as the Wlav Pro.
Full disclosure, I'm probably a little biased because I got my PR-2's from a guy on Facebook marketplace for $90 each and they were still brand new in the box. But even at around $200, these things are worth every penny. You could have ten of these things if you needed them, and they would all get great sound as long as you placed the lavaliers correctly. If you're looking for a good lav-mounting solution, get on eBay and search Wlav Pro for the mounts shown in my picture. You can use them with Ursa, Rycote, or Copkim stickies, and the guy also sells a magnetic version. It makes mounting them super easy and eliminates most clothing rustle.
Back to the sound quality: for $200 I don't think there's a product on the market that gets better sound than this. Sure, it's not a true wireless mic, so you can't monitor the lavalier from your mixer/recorder bag or cart. But I've used the app to do a quick and dirty monitoring, and it seems to work fine. It's easy to select the recorder you want to monitor, listen for a few seconds and make sure it's still recording good sound, and you'll be fine.
I can't afford the newest or best sound gear very often. My sound bag setup is a Sound Devices 442 mixer, 744T recorder, with four Sony UWP kits in the bag. If I ever need a few extra lavaliers, I can use the PR-2. If I ever want to go to a shoot and not bring my entire sound bag kit, I can bring my two PR-2's and a boom mic and I'll get great sound with a small equipment foot print.
All in all, I would recommend having 2-3 of these in your kit because honestly, it's worth it.