BuddyLoveAK

I've never heard of a 4-6 hour evaluation before. 1.5 hour max. Whether it's good or bad? It depends on the results. It sounds like they're finally taking you seriously and thus the long evaluation. If the VA is willing to put you through a 4-6 hour evaluation then they are taking your condition very seriously. In my humble, non-expert opinion, I'd say be honest and not minimize your symptoms and you should be ok. But other more experienced people may have more detailed advice. Personally, I'd consider this an opportunity to let yourself be heard and go for a possible increased rating, if it's called for.

Wow! This was unexpected! The BVA granted my appeal March 1 2019 and I got my rating today on eBenefits and VA.gov stating 100% P&T! The Alaska RO worked really quickly. I was expecting 6+ months waiting then a lowball rating, but this is terrific! Once I get my retro check (which they gave me the correct retro date too) I'll be making a donation to Hadit because you all have been so helpful! Thank you to everyone who has helped me get here! 

I just checked VA.gov today and it says the judge granted my appeal for service connection of bipolar! I don't know the details yet, but this was the major hurdle I had to get over. It's been about 3.5 years and I wanted to thank everyone who has helped me along the way! All of your advice has guided me to success and has helped me keep my sanity through this process. Thank you all! I'll update as soon as I know what percentage I got. Thanks again!

I'm sure others will be able to find better info, but here's a couple things I found with a quick search.
Here's the form they'll be using to evaluate your ankle:

https://www.benefits.va.gov/warms/bookc.asp

It depends on where you're located. Each place is different. Here in Anchorage, AK it took about 3 months for my initial application to get decided.

In my non-expert humble opinion, I say give it a shot. There's going to be fewer cases in RAMP, so chances are with fewer cases the faster the claims will be processed. The VA website said they're shooting for 125 days per claim, so who knows maybe you can get yours done in a few months! They'd have to really screw up to make RAMP slower than legacy already is!