There are many great guitar mini amps available on the market today, each with its own unique features and strengths. Here are five of the best:

1. Boss Katana Mini - This mini amp offers a surprisingly powerful sound for its small size, with three selectable amp types and a variety of built-in effects. It also has an aux input for playing along with music from a phone or other device, making it a versatile practice tool.

2. Blackstar Fly3 - This mini amp has two channels, a built-in delay effect, and a unique "Infinite Shape Feature" that allows you to shape the tone of the amp to your liking. It's also very lightweight and portable, making it great for travel.

3. Vox Mini5 Rhythm - This mini amp packs a lot of features into a small package, including 11 amp models, eight effects, and a built-in drum machine with 99 rhythm patterns. It also has an aux input and a headphone output for silent practice.

4. Yamaha THR5 - This mini amp is designed to replicate the sound and feel of a full-sized tube amp, with five amp models and a range of built-in effects. It also has a USB port for recording, and can be powered by batteries or an AC adapter.

5. Fender Mini '65 Twin - This mini amp is a miniature version of Fender's classic '65 Twin Reverb amp, with a solid-state circuit that delivers a surprisingly authentic sound. It has volume, tone, and gain controls, and can be powered by batteries or an AC adapter.

All of these mini amps are great options for practicing at home or on the go, and each has its own unique features and strengths. Ultimately, the best mini amp for you will depend on your specific needs and preferences as a guitarist.