Experiences with Martyn Gerrard?

Hi all, partner and I are looking to buy our first home in North London and have our eyes on a new development by Martyn Gerrard.

Price is good, lease is 999 years, zero ground rent and low service charge. We are very interested in this one but are hesitant to go straight into making an offer. MG will be the maintenance company for this development.

We wanted to know if anyone's had any experience buying with MG? Have heard horror stories of service charge massively increasing yearly, that would be our main concern. If there's anything else worth considering too would love to hear it. Thank you.