My almost nine-month-old son is pulling up and will be taking his first steps soon.  We got three different brands of shoe to try for his first pair, including these, See Kai Run, and Robeez.

Sole:
The soles on See Kai Run are the hardest of the three.  The are also probably the most durable.  I think they are good shoes, but more comparable to Pediped Grip N' Go.  I'm not sure I would pick these as first shoes.  I think of the three, my son would have the hardest time feeling the ground, and they are also the heaviest.  The Robeez have the softest soles of the three.  They also offer the least protection.  I think these would be best for indoor use or on grass, but also allow my son to feel the ground the best.  The Pediped soles are a happy medium, very, very flexible, with just a tiny bit more protection than Robeez.  I would put these on him for outdoor play.

Fit:
My son has those slightly wide, thick baby feet.  This makes the See Kai Run a little hard to put on, and they don't tend to stay on.  The Robeez are slightly easier to put on, but still a tad tricky.  They do stay on once they go on, and he seems to have more freedom of movement in them.  They are not as clunky.  The first time we put them on him and stood him up, he could balance on his own without hanging onto anything.  They seemed to help him balance.  The Pediped are also have a nice, wide fit and are the easiest of the three to get on his feet.  Once they are on they stay on like the Robeez and he doesn't seem to notice either of the two on his feet or try to take them off like he does with the See Kai Run.  It's worth mentioning that size 4 See Kai Run, size 6-12 months Robeez, and size 12-18 months Pediped are all roughly the same size.  So all brands do run a bit different, and Pediped seem to run small.

Style:
Personal preference, but I think Pediped are the cutest of the three.  Robeez just look weird with the elastic on the back, more like moccasins than shoes.  See Kai Run are cute too, but not my favorite.

Price: Robeez is the clear winner here, unless you can find a sale.  A pair of soft sole Robeez will set you back twenty five bucks, a pair of Pediped originals are thirty seven, and See Kai Run are forty eight.  Consider that with each price increase you are getting a little more protection.

I'm happy with all three brands for different reasons, but if I had to pick just one I'd stick with Pediped.  Robeez are great for indoors and first steps, See Kai Run are great for a little more experienced walkers, and Pediped fits in both categories.  I like them best because the sole is soft AND durable, and they are easy to put on and keep on.  They are perfect for my son's wide feet.

Update 5-24-13
My son is now walking half the time, crawling the other half.  His See Kai Run shoes just went in the garbage last night because the leather on the toes was completely worn through.  We retired the Robeez to the closet because they no longer fit.  We are still wearing these Adrian's and they look perfect.  I just purchased a pair of Grip N' Go sandals for summer, "Brody", because he needs the reinforced toe for daycare.  He was walking great in his See Kai Run, but the toes are not reinforced, which IMO is a bad idea for toddlers.  They are unsteady, they fall, the toes get scuffed, and pretty soon they look terrible.

Update 7-24-13
My son has been walking for 2 months and is just growing out of these.  They still look great.  I'm going to pack them away, along with the Brody sandals he outgrew.  He is wearing Hayden Grip N Go now.