Have not listened to this THA episode yet, but got miniVNA Tiny in 2014 and works quite well for most simple antenna applications. Need to be careful with calibration drift and temperature compensation. Right now using R&S entry level FPC1500 SA with 1-port VNA option for quick antenna measurements (over LAN, up to 3 GHz). Quite happy about it. Has much lower noise floor, faster speed and smaller drift.
miniVNA Tiny performance improved a bit after reworking the circuit a bit (decoupling, filtering, shielding). Wish I could redo most of its PCB layout to perform better. Exactly the same story with DG8SAQ VNWA3 – there is room for improvement. Also have not used them as SA, only as VNA.