We have a Potette Plus for travel times, and a Baby Bjorn at home... and got a potty here at my parents - which hasnt seen a lot of use as of late due to some set backs we had.
We're doing more of EC at this point, but considering how tall Jonathan is getting, it won't be too long before he HAS to be out of diapers because I wont be able to afford a larger size for him within the EU. They do make smaller undies for EC at his age (thank goodness!) and they run about 1-2 Euro for a pair or two, depending where you purchase in Germany.
For now what we had been doing was keeping the little potty across from the big one, and first thing in the mornings, or when I have to go, sitting him on it. If he goes, AWESOME!! - if not, we just encourage to try again after he's made an effort.
We had made a lot of progress before coming to the US, and once we got here, he regressed a lot, so we just took a more relaxed attitude. With teething, we're also set back a lot (6 at once, with some being molars) so I look for it to be a long process, of which we will try to take a really relaxed stance with. I'm planning on getting an extra potty to keep on hand on the opposite end of the house, since our square footage is rather large, and it is a long walk or crawl for someone under 2 to get to the potty in time when they actually *do* signal.
We are having trouble figuring out when he has to pee, but catching BM is pretty easy if we can get him there in time.
My sister is nannying and her almost 2 yr old is potty training and had a setback today, she intentionally had a BM in her undies because she did not want to take the effort to go to the potty, and had been going solidly for 2 weeks without wetting her pull ups.
There is a group of forums out there if you may be interested in EC (Elimination Communication) and they might be of help to you. I find they have some really great ideas and are very supportive, no matter if you are beginning EC at birth or closer to 3.