What people say about us

Below you will find a variety of testimonials from our clients and members.

Testimonial from Jonathan Guy

Managing Director at Aqueous Digital


“We have been using COS for around two years and frankly I don’t know where we would be without them. Mike is a fabulous ‘remote’ member of the team and has been enormously helpful in both sorting our accounting system (and accounts) for us, as well as providing valuable mentoring for our Financial Controller. Highly recommended.”

Testimonial from Abi Wood



The webinar hosted by Karen was, as always, very informative and whilst Karen presents in a very friendly manner she is extremely professional and knowledgeable. I wouldn’t hesitate to recommend COS.”

Testimonial from Colette Dalton

Owner of Keeley Consulting


Having used Xero and Sage for many years, I’ve just taken on a client who wants to use Quickbooks. As this was my first client on the platform rather than stumble my way around, I decided to get some help with the navigation of it. As always Karen was happy to help and to share her in-depth knowledge and expertise with me. After just an hours meeting my confidence with the new platform rocketed. COS have a way of making their members feel part of a wider support/mentoring network, which in my opinion makes being self-employed less daunting and isolating. Thank you so much

Testimonial from Caroline Clarke

Owner of CMC Bookkeeping


“It was so, so useful!  I did a Payroll Management Diploma last year but your webinar explains things much more clearly.”

Testimonial from Joanne Tatler

Employee of Van Blanc Transport Limited


“Thank you for a really great day yesterday, I felt that I really learnt a lot and that’s down to the way you [Diane] taught us.”

Testimonial from Stuart Middleton

Managing Director of Aquacut Limited


“COS has been Aquacut Limited’s bookkeeper and trusted advisor for a number of years and have been a vital partner during our exciting journey as we developed our business.

When I bought the business seven years ago, COS were the bookkeepers at that time.  We wished to transition from a one-user, dated accounting system to one based ‘in the Cloud’ and COS were important in advising us of our options and holding our hands during the transition.

Our business is over four times as large as it was seven years ago.  Our company has developed into e-commerce and entered new markets.  COS has been professional advisers, with great feedback and recommendations as well as responding professionally and quickly as we explored together various systems we could adopt.  I’m confident we would have struggled without COS support as they have been there for us, every step of the way.Karen and her team are professional, but user friendly in their approach to business. I cannot recommend them highly enough.”

Testimonial from Peter Brassington

Senior Partner at EKW Chartered Accountants


“I have worked with COS Bookkeeping for over ten years and have always found them to be knowledgeable and efficient. They provide a great deal of support to our mutual clients not only in terms of bookkeeping but also the industry and software knowledge they use to assist clients run their businesses more efficiently.”

Testimonial from Simon Leigh

Managing Director at Allens Chartered Accountants


“COS Bookkeeping have for many years been a huge support to Allens and our clients. They provide superb service and the quality of the training is top notch. They are consistent, extremely professional and, unsurprisingly, in great demand. I would not hesitate to recommend Karen and her team, and have done many times always with the best outcome for my clients. Karen is passionate about her work as well as being a great communicator with clients on all levels. She deserves her success.”

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