DD is 30mo, 36" tall, and still uses the BBLP.
Yeah, she has to squat on it -- but squatting is actually GOOD for you, for elimination. Our culture is kind of the exception in that we have been taught to "sit" rather than "squat".
It's great for having beside the bed for quick middle-of-the-night pees, since it's not huge and cumbersome.
The ONLY problem we have with it is when she poops in it -- if her poop is, um, large, it will pile up all the way to her bum and make a mess on her lol...
Most of the time, she uses the regular toilet. Sometimes she wants her "green potty" and it's good for her to have options, and like I said it's great at night. We've never seen any need to get a larger potty. It's this and the toilet, depending on her preferences at the time and the particular situation.
We were diaper-free from almost the start, and often held her over the toilet as an infant. She started actually sitting on it, backwards, well before a year old (with me holding her just in case). We added the toilet ring around... oh... a year or so, I think.
Starting around age 2, maybe a bit older (why is my memory so fuzzy about timelines...) she started asking to sometimes use the big toilet without the insert. She sits forward, like a big person, and holds herself in place. She can get up onto the big toilet with no help -- doesn't even use the step stool anymore, which she did need when she was littler.
So I would say... certainly, try a toilet ring. I don't think it's any more work than any other option! Have a step stool so they can get up themselves if you want to promote independence.
But personally, I wouldn't get rid of the BBLP. I think it's a great potty and usable all the way up to age 4 or so. It doesn't have to be a "comfy chair" to be a suitable place to pee. And it gives the opportunity for independence.
Heather, mom to Caileigh 12/06 and aspie ADHD prodigy David 05/98 :intact lact