I wouldn't say that I'm a doubter, but I'm certainly sceptical.
I'm not overly excited about seeing Peter in High School again, and after the pointlessness of the ASM films, anything that comes across as a 'rehash' or re-imagining will be extremely unwelcome.
I also think that Spider-Man has a rich enough universe that he doesn't need to be a part of the Marvel Cinematic Universe. There is a certain amount of irony in the fact that the heroes that he traditionally has the closest relationships with (the FF and Daredevil) are unlikely to be a part of the MCU in the near future.
I would probably rather see him go it alone but I do agree that the MCU has a great track record, and I am definitely curious to see their take on Spidey.