Great. Well, yes, our loyalty program, Ultamate Rewards, is one of our greatest assets, and I'm really excited that the investments that we've made, the work that the team does, the commitment that our store teams have driving that experience continue to pay off. We're really proud of 9% growth in members in Q1, spend per member growth. Our strategies, our plans are working.
We do -- separately, we do believe we continue to improve share of wallet of our best guests. I talked about Platinum and Diamond members being -- showing strong growth. We believe we continue to add new experiences, add new brands, engage them in more touch points. Everything that we do really is designed to increase share of wallet. If we have a store-only guest, to get them to shop, to use our salon, to shop online, to download our app, to get our credit card, to shop at Target. All these experiences collectively add to share of wallet. And we have continued evidence that when we do that, it works to increase share of wallet.
And one example, a store-only guest that starts shopping us in an omnichannel online way. Their spend with us increases over 2.5x. So we know we're improving share of wallet across our engaged guests. And as we add new members, which we continue to do as we grow, we're on the journey of getting them more engaged with all of our touch points. So we are committed to that. We're finding a lot of success.
As far as some of the personalization, that's another aspect of our experience that we've been working hard on for several years, and it is working and paying off. The return of our programs around things like replenishment or engaging in new categories are working. We see strong return. And in fact, the return is strong enough that we're going to continue to invest more in data capabilities, bringing in new tools, leveraging innovation across all ways of experimenting and engaging with our guests. So we're seeing good returns, and we see there's a lot more opportunity for us ahead. In the world of personalization, you will buy our data.