Question: Is a Regenyei Armory feder worth buying?
My verdict: Yes, do it.
Regenyei Armory feders are ubiquitous in HEMA clubs across Europe and North America, and they are popular for a reason. They tend to be well-made and they tend to last for at least a couple of years, while not being particularly expensive for such a good training tool.
They have a very good reputation, and they also come with a warranty for breakage from normal use within a certain timeframe, so you can have peace of mind that they are well-constructed (if not, you will receive a replacement) and that the smith will take pains to make sure that it is sufficiently well-made that they will not need to replace it.
If you have the opportunity to get a Regenyei feder, it will be worthwhile. Ideally, choose one of the medium blades (the light blades are too flexible, the heavy blades are too stiff to be safe), so that your training partners will be happy to let you practise with them.
Motivation and transparency
I have a few of these swords, which I have bought for myself over the years. I use them regularly. I am perfectly happy to see one of my students coming to my club with one of these.
(Edit: this “motivation” section was added on the 9th of March 2019, as part of an effort to improve the transparency of the various reviews on this website.)
Keith Farrell teaches HEMA professionally, often at international events (why not hire me to teach at your event?), and has an interest in coaching instructors to become better teachers. I teach regularly at Liverpool HEMA, and help behind the scenes with running HEMA in Glasgow at the Vanguard Centre.