I tried the Houge and it took a small amount of cutting with an exacto knife around the mag release. Plus it doesn't quite conform tightly around the backstrap area. I also tried the Fixxxer brand which is similar to Houge with the same results.
It really comes down to personal preference and feel, and the DTOM was best for me.
Available on Amazon for $7.95
DTOM Tactical Grip Sleeve for Ruger LCP and Taurus TCP
by Don't Tread on Me Conceal and Carry Holsters
This is my Amazon review: I have tried grip sleeves from DTOM, Houge and Fixxxer for my Kel-Tec P-32. The DTOM is superior in feel and fit. There is no cutting, it fits like a glove. The others require trimming, but to be fair, they are not specifically for the P-32. The DTOM isn't either but by design it is slightly smaller, more stretchy and thicker on the sides where you see the holes. My wife and I can grip the P-32 best with the DTOM.