Installed - so easy to setup, is it as secure as open vpn?
Possibly. There are a lot of sites where you can compare between Ipsec v2, OpenVPN, and Wireguard (forget Ipsec v1/L2TP/PPP)
Each has benefits and drawbacks.
OpenVPN and Ipsec have been around a long time, and are well known and tested. They can both use certificates which can enhance your security considerably, but are not so easy to set up.
It will depend on your needs.
For home use defintitely try Wireguard as it is simple to install and use. But you need an app so consider your privacy there.
For more business orientated work you may want to look at OpenVPN or IPsec. They might not be quite as 'quick', but they are the industry standards and used by governments and business globally.
OpenVPN needs an app for a mobile - but clearly privacy is involved - and certificates.
Ipsec can be used on mobiles natively so that is a bit less overhead and better privacy. It can be used with just passwords, or with RSA signatures, or certificates.
Wireguard and OpenVPN have Koozali implementations. I have had an ipsec implementation for years which I need to finish upgrading for v10 and plus better mobile support. yet another job
I'd have a good read around so you really understand the differences, pros and cons.
YMMV...