Speaking to Benzinga, Tigress Financial Partners Chief Investment Officer Ivan Feinseth said that he was excited for the Apple Inc. (NASDAQ: AAPL) launch of the Apple Watch and felt it would "connect people" to more Apple products.

"The more Apple products you buy, the more you stick with Apple products," Ivan Feinseth said, as he explained how an Apple Watch buyer with an older phone would also upgrade to an iPhone 6.

Feinseth estimated that Apple would sell 15-17 million units "in their first run," which was a "small percentage point penetration into the existing base" of iPhone users -- a "built-in customer base and fan-base."

"It's an extension of the Apple ecosystem that ties people to Apple products," which "increases and extends the functionality" of the iPhone and iPad, according to Feinseth.

Related Link: Why This Analyst Thinks Apple Watch Will Be 'Phenomenally Successful'

Feinseth also highlighted an area in fitness that may be impacted by the Apple Watch: The ability to monitor and track the user's heart rate on screens throughout a gym could help users maintain optimal activity to achieve fitness goals through the Watch and related apps.

Over the longer-term, Feinseth felt there was no way the Apple Watch could be measured as a failure.

In terms of surprises, Feinseth thought that young women as a demographic would be a significant buyer of the Apple Watch, which had not been a key overall demographic for technology products.

Heading into the Watch release, Apple Inc traded at $127.46, up 0.68 percent.

Kevin Riley and Brianna Valleskey contributed to this report.