I've had my fair share of buying potties so hopefully this is helpful:
- Potette Plus: Many parents like this but we don't. Had to return it as DS fell down on floor and injured himself a few times(he's quite heavy). It's not stable no matter how much we tried to adjust and held it.
- Summer Infant Potty System: Once again another one that many parents like. I initially liked it as DS liked it, soft cushion and all. it also fits onto toilet seat very well. After 1 month, even though it was cleaned many times a day, it stank and was impossible to clean. Suitable if you don't mind a slightly smelly potty.
- Thomas potty from Mothercare: Not great for initial training as it really hurt LO's bums in the beginning and wees don't actually go in as it's tiny, therefore a very upset DS when he saw wee all over the floor even though he'd been really good and sat down on potty in time to wee. Once trained, it is brilliant as it's small and portable with occasional spills. DS likes it now.
- Thomas toilet trainer Seat: Bought this after 1 month PT as we got rid of the smelly Summer Infant Potty System. Fits on our toilet pretty well and DS immediately started poo-ing in the toilet rather than his potty, hoorah! We all love this one. It would probably stink someday as it's also cushioned. But so far after 3 months of heavy use, it still doesn't smell so very happy with it.
- BabyBjorn potty chair: I didn't actually buy this one but just tried it in the shops. It gets really good reviews and I think it looks pretty good, DS loved sitting on it(with pants on of course). At that point we were already happy with the 2 Thomas products so didn't want to buy yet another potty. I reckon if we'd seen this earlier, I would definitely have bought it. But then we'd have 3 potties rather than 2 which is a bit of a waste.
I have to say, my favourite ones are those cheap looking little potties I see in public places, but can never find them shops.
Hope this helps!