Use/Used lots of their products over the years, all have done the job and not hugely expensive. Currently have those Aptera 155 under my ProAc Studio on my office desk, work really well, before that had pucks, before that those foam wedges, the 155 did bring an improvement to imaging and stopped so much bass transferring. Bought via a deals from a Pro Audio shops or Juno or Classifieds.
Have the Orea under my main hifi components and the black Iso pucks under normal kit, do the same job but the Orea look nicer and have different weight combos possible. The rectangular stands are good under centre speakers. Not tried under Subs, I use the SVS Feet.
Also trying out the zaZen platforms. kinda like posh Cyrus/Mission Isoplats.