Know that it is part of the onboarding checklist to leave a Glassdoor review...so basically you are there less than a month and they want you to review bc at that point you're still happy (ie many "great onboarding!" reviews)
There was a big layoff in Feb 2025. Some really great people were let go. Some incompetent people were not. This is because all the company cared about was how they looked on paper, instead of actually caring about retaining employees who produced the best results. Regardless of what was communicated, the severance package was not "generous", but basically what is required to make sure there are no lawsuits.
Typical 'tech startup' things like poor work-life balance, no great processes in place, and scattered management. Some do have a gravy experience due to having an easy-going manager, while others are working weekends to meet demands.