Installed 1803 build 17133 a few weeks ago over the top of 1709. No issues to date whatsover, except I had to disable Secure Rules and Secure Profiles in Windows Firewall Control 5.3.0.0, otherwise I couldn't open Edge or Windows Defender console.
Today, I did an inplace upgrade to bld 17134.1 and that went without a hitch. Immediately applied the first update for 17134.1 (KB4135051) which brought it up to 17134.5.
So far so good and not bad for a Dell Vostro Core 2 Duo 8400 PC, circa 2008