Anyone Navigated a UK Settlement Visa Appeal? Advice Needed!

Understanding the Appeal Process
Hey all, I recently received a refusal on my partner’s visa and I’m now looking into the uk settlement visa appeal process. I’ve read up on it, but I’d really appreciate advice from anyone who’s actually gone through it.
Key Questions I Have:
How long does a typical immigration appeal take?

What’s the success rate like if the visa refusal was based on financial documents?

Should I go for a paper appeal or oral hearing?

Is professional legal help really necessary?

Considering Legal Support?
I’ve heard good things about Visa and Migration Ltd. Apparently, they specialize in complex UK visa appeals and offer detailed case assessments. If anyone here used their services for a uk settlement visa appeal, I’d love to know how it went!