So I felt I had to chime in for those wondering about Boost...
When it is implemented right and not faulty, it is amazing. Better than any other cushioning. However, I've had inconsistent experiences with Boost (particularly the Rose 6).
Some of you have already seen me talk about this, but I've been through 5 pairs of Rose 6 shoes for different reasons (sole split, sizing issues, hard Boost, etc). The only pair I had with Boost that was as described by everyone was the Primeknir color way. Unfortunately had to return those because they were too small after one night of play...
I had to return 2 pairs of Rose 6s for hard Boost (that actually left me sore the next day rock hard). My current pair started off great, but after a month of play, the Boost got firm and compact and can no longer be worn for hooping in.
I tried on these Hardens and the Boost felt great. Low-profile but bouncy. I could definitely feel potential heel lockdown problems so I passed, but the Boost was bouncier than I expected (especially describing them as being so firm).
Boost has had a record of being inconsistent. More so than not, ppl are lucky and get "good Boost". In my experience, I would always try on at least 2 pairs to be sure nothing is off. You should always be able to feel Boost from try on, bounce around in them and make sure you feel feedback and impact protection. They may be low profile, so that's your judgement as to whether that'll work, but if you can at least feel SOME bounce and impact protection I would say it passes.
Long story short, DO NOT COP unless you've worn them in store first. If you're ordering online, and they come in and aren't responsive, don't waste time holding them and either exchange or just get the refund for them...