The Aeotec DSA03202-V1 Z-Wave Minimote is definitely a budget friendly choice in the Z-Wave remote controller market, but it is still quite a capable little device. While I am now using each of my two in vehicles to control lighting and garage doors as I approach the house, Inside the house, maybe have one in your bedroom, living room, kitchen, etcetera to provide you with convenient, low cost access to a number of your smart home's features.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips