Since our boy got an EarlyRider Seeker 14 because other bikes didn't offer a low seating position, we had to get his older sister one too. We decided on the Seeker 16 - Factory Second. Compared to the new Seeker 14, I can't find any flaws at all.
With her almost five years old and her experience with the old bike, we didn't expect any problems with the transition, except for the hand brakes, which she didn't use yet, but mastered without difficulty.
While the Seeker 14 looks cute because it's so tiny, the Seeker 16 already has the frame geometry of a big bike and looks cooler to me. Both the 14 and 16 are very light, so my kids can easily handle them and even carry them around.
On her second day with her bike, she went to the gym in the morning, took a nap at home, and went swimming in the afternoon, which added up to over 12 km on her bike. After 10 days, we went to our local pump track where both kids could ride with no problem. The kids liked the sound of the tires on the asphalt and the shortcuts over grass and dirt.
So: the Seekers are a heck of a lot of fun to ride on any surface, very easy to handle and greatly expand the cycling range with toddlers.