I've taken a few Karve classes here and they're great! I've tried several instructors here and they've all been great with instructing clearly, providing modifications, and keeping the energy up. The instructors also all have their own modifications and teaching styles, so every class feels a bit different. I've taken barre classes before, but I think you could show up to this without any prior experience. Studio's gorgeous as well.
One minor quibble: the website's a little confusing to navigate, especially in regard to class packages. On one page, there will be mention of one class package, but then not on the next page, etc. I would just suggest asking the studio directly and looking through MindBody to see what's available.
FYI, this studio requires those grippy yoga socks. You can buy them at the front desk for $13-15 or find them at a sporting goods store.