At first, I thought Sennichimae Doguyasuji Shopping Street would be similar to Kappabashi in Tokyo, but after actually exploring it, it was definitely much smaller. Kappabashi has more stores, especially when it comes to large commercial kitchen equipment and professional restaurant supplies. Sennichimae also mainly sells restaurant and kitchen supplies, but everything is more concentrated, which actually makes it more practical for the average tourist.
After comparing the two, I think Sennichimae Doguyasuji's biggest advantage is its prices. While it doesn't have the overwhelming amount of merchandise that Kappabashi does, many of the pots, tableware, and small kitchen items are very reasonably priced, and it basically has everything you would expect. You can find pots and pans, knives, tableware, and food replica products, and there are also food replica-making experiences available. Unless you're shopping professionally, the selection here is more than enough.
The location is also very convenient. Namba, Sennichimae, Nipponbashi, and Dotonbori are all nearby, so it's easy to combine this with other popular shopping areas. You can easily spend most of the day walking around and browsing. To me, it feels a bit like a “smaller version of Kappabashi”—smaller in scale, but more concentrated, with prices that can also be a pleasant surprise.
By the way, the drink vending machines in the alleys around this area are also interesting. Prices are often lower than in popular tourist areas, and occasionally you'll find some more retro or unusual drinks. If you keep an eye out while shopping, it's surprisingly easy to come across these little surprises.
