Depends on what is reliable for you. If you're talking only about the connectivity issues, the latest Gingerbread OTA with the latest radios solves it. Also the GPS locks much faster. Don't forget Thunderbolt was the very first LTE handset on Verizon's LTE network, which makes it a milestone, but also very buggy first gen device.
Buggy to say the least

Sent from my ADR6400L