I'm currently playing an Eldritch Knight and at 4th level I picked up the Ritual Caster feat. I chose Find Familiar and Alarm as the two free rituals spells.
I chose a Hawk as my familiar, mainly because my character's family name is "Huntinghawk" but also because it has a much better Perception bonus (and advantage) as Wisdom was my dump stat. So far it has worked out great, especially out in the wilderness as it has helped spot ambushes and the like when my character would not have personally been able to. It is great for night time watches as well because as a spirit, it really doesn't need to sleep.
Now would I have given up one of my Eldritch Knight spells for it? Probably not.
I probably wouldn't even have taken find familiar as part of the Magical Training feat (which I took at first level for being a Human).
Yep, as a variant human with the Magic Initiate (wizard) feat, I took it at first level for my EK.
Super useful, as it helped expand my character's usefulness in exploration/scouting, and I've been able to use it frequently in combat to provide advantage by using the help action. If it dies, I can recast using the spell from the feat, rather than my normal spell slots. This also gives me the chance to swap its form into different forms if needed.
I prefer the Owl for helping in combat, since it doesn't provoke AOO's with movement, it can swoop in- help- then fly out of danger. While not super useful yet, I have had it deliver a couple of shocking grasps, making for a surprised opponent who would have normally been behind cover.
Note that the familiar moves/acts on its own initiative from you. So if it provides a 'help' action, it might be providing advantage for one of your teammates instead, not necessarily for you. Because its not always 'in sync' to provide help, I've found the ability to be much less of an issue than I'd feared it might be. It doesn't seem to be game breaking or over powered at all. All in all, I'm happy with the choice.
I really like this option. Plus, you picked two perfect spells for "ritual only"
But then the owl wouldn't be 'crunchy Owl" with no bones in it.The owl would be more useful for other things if you took the bones out.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.