I think much of it comes down to what someone used first and what they are most familiar with. I don't have any major issues using the RCI site, but it has its own quirks. I am very proficient with II and can search and find things much quicker there. There is a reason big banks target college kids trying to sign them up for bank accounts on college campuses. Studies and metrics show they are likely to stick with the same bank for a lifetime. Switching is hard and their website or app is already familiar.
Maybe, but I don't feel this strongly between RCI, HGVC or Wyndham UIs for finding stuff, though I did have to "learn" how to use the Wyndham search. I think I may have hit on a huge part of my issue - if you've watched the video or read my theory posts - it could be the way you are using the site for sure.
The absolute best experiences I've had with II is when I'm looking for a specific resort and I know their II code. That's least painful. And if you already know your deposit is gonna pull that, it isn't that hard to scan a single resorts list of units available.
The problem is - for non II veterans, we
don't know what resort code to search by. We don't know if our deposit will pull anything specific, we don't know where we want to go necessarily. So you end up in that click forward, click back, click and wait 20 more times.
And if you're looking for getaways to see if there's anything vaguely interesting you might just want to go to - that's all those problems up to 11.
Another point, even if you know where you want to go, if you don't know the resort code ... ugg. RCI you start typing the resort name and it shows completions under the search box. Quick, intuitive and easy (similar to Google search suggestions). II you type something in, it doesn't know what you meant so on a new page (I think) it non-obviously shows a dropdown you have to click to look at to find the resort you want. It's actually easier for me to do a search with Kagi and find the II page with the resort code and then type the code into the search boxes.
Or just consider that if you do a search and you're looking at II results and RCI results. II shows you the first 3 dates in your range for each result. RCI doesn't show you specifics. If what you want is in those first 3 dates, II would win here, assuming you're not considering more than one resort location (again, CODE search is fine). However, if you are comparing resorts or want to see "more dates", in II that takes over the page, you can't open "more dates" with a middle click. In RCI each potential resort is a new tab with a quick middle click, and a quick click on "all units" will show you months of availability in one quickly scrollable list. Even better is because it's a new tab, you can instantly go back to the search tab, pull a few more potential possiblities, and click between them very easily and quickly. To go between two possibilities in II, it's click on back, wait. Click on "more dates" wait. and by now you've forgotten the initial tab you were comparing.
So yea, if you don't cross compare like I like to do, the limitations of II are probably less annoying.