I’ve literally had zero problems with WellhubGympass. The layout is just fine for me (actually better than the website, much easier to use). Every check in I’ve done has gone smoothly.
However, they’re not very upfront about the fact that you’re only allowed one check in per day, which has made things a bit logistically difficult sometimes (for example, if I do my regular morning workout, I can’t then join my partner for a swim after work, or try a dance class or some karate lessons later, so I really have to plan things out). This has really reduced my ability to try out different things, because trying a class or whatever means skipping my morning workout. I wish there was a way you could “upgrade” to two check ins per day.
Update: Downgrading to 2 stars because they’ve jacked up the prices horrendously and reduced the number of locations that I can use. They moved my normal gym from a bronze to silver level, which was a 50% increase, and then not even a month later they jacked up the prices of all the plans. So now I’m paying nearly TWICE what I was paying two months ago, for FEWER options, and I can still only check in once per day.