A total of 5 reviews of this product on Reddit.
$100 can get you a proper 10mm weightlifting belt on amazon. Mine is easily my favorite item I own and help me a ton though compound barbell movements
I personally have an Inzer forever lever but a prong belt would do me just fine
Stoic is IPF approved and has a belt on Amazon
I have this one and think it’s great. Been using it for years. The only things that matter are that belt actually covers your abs (Im 6’2 and 4” is perfect) is 10mm thicc and non tapered. Other than stitching, I can’t see how most name brand belts differ and you should be fine. Obviously buckle type matters but that’s more a personal preference.
Powerlifting Belt/Weight Lifting Belt – 4 Inches Wide – No Taper for Maximum Support & Protection https://www.amazon.com/dp/B01MTSVRL6/ref=cm_sw_r_cp_api_i_T9AIFb5H040CD
Belts can help, but it does take awhile to learn how to use a belt so you’re not likely to see a drastic immediate increase. There’s no real reason to not use a belt though, so go ahead and get one. Make sure it’s a full leather powerlifting belt like: https://www.amazon.com/Powerlifting-Belt-Weightlifting-Protection-Deadlift/dp/B01MTSVRL6/ref=sr_1_8?s=exercise-and-fitness&ie=UTF8&qid=1490017163&sr=1-8&keywords=powerlifting+belt.
Sounds like it’s time to do a 10% deload and start moving back up if you failed your sets. If you fail out again after the deload, it’s time to swap to a slower program with weekly gains as opposed to every workout gains.
I just use this one I found on Amazon
It’s cheap and offers good support. Can’t ask for much else.