I use this program daily, and it has changed the game for us in ways I never would have expected.
It's in the browser - everything is a link, making sharing, discussing, collaborating with everyone within your company very natural.
View only access is free, meaning your support team can access your CAD directly, securely, with no extra licenses. This reduces the friction, and also reduces how much docuemntation we need to maintain to fully enable our support to solve issues on their own.
Admin controls are clear, concise, easy to use, and it is built so you can try something, change your mind, and adapt the tool to your company's needs, instead of forcing certain early decisions that lock you into a sub-optimal decision forever (other programs tend to do this a lot). This makes implementation easy.
It's stable - I've never lost more than a second of work history due to power outages, computer issues, or internet issues.
It's hung a few times in the last year (infrequent), but a quick refresh on the browser, and I'm right back to where I was.
Customer support is included, and they don't discern between bugs and issues vs 'how to use' questions. They just want to help, and are extremely responsive.
Pricing is transparent, and there are no hidden 'gotchas.'
Export naming conventions combined with their google drive integrations are extremely powerful, and have enabled a whole suite of low-code automations that have enabled us to effectively automated 90% of the work to translate to an ERP, and the options to build more direct interfaces exist for the long term.
They are constantly releasing new and useful features, and are attentive to feature requests. A concern of mine was once they were acquired by PTC, innovation would slow or stop, but they certainly have shown no signs of slowing down. I've had feature requests get implemented within two weeks (this was definitely an exception, but was impressive none the less).
Overall, it's pretty fast. It's faster than Solidworks for most things, and does well with large assemblies, but will still get bogged down with very large assemblies.
We will have 25 million triangle modesl / 5,000 bodies, and will get some slow down, but it still performs significantly better than Solidworks did for the same size assemblies. Not as fast for huge assemblies as CREO or CATIA, but for the cost, ease of use, implementation, and what we actually use it for, it knocks everything else out of the water. Review collected by and hosted on G2.com.