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Our Testimonials

See what a few of our clients have to say about us:

"We really enjoyed the event so a huge thank you and your team! It definitely brought us closer together and the examples of team work were great!"

Barclays Corporate

"A big thank you to the friendly and well organised staff from Costello events for putting together a fun challenge that was enjoyed by the entire team. Much appreciated and looking forward to the next event"

American Express

"All the feedback I received was incredibly positive and watching by the sidelines it was clear they were all enjoying the task.

Once finished, the Masterpiece revealed, I think people were blown away by the scale of their achievement. It was a great example of team effort at its best and left them all feeling that they'd accomplished something quite special.

The picture will take pride of place in one of the BBC buildings to remind us of this year's conference and the great time we had - Thanks again to you and the team"


"Just a note to say a huge THANK YOU for all your efforts yesterday. you helped to make it run perfectly - and to deliver a very happy client. It's a real delight to work with true professionals - and you are certainly that. I look forward to the next time... and the time after that... and the time after that..."

The Challenge Factor

"I have had some great feedback and everybody had an excellent time."


"I wanted to thank you and your team for the organisation. We had lot of Fun and everyone enjoyed the afternoon we spent with you - Thanks."

Group Director | Dimension Data plc

"The event went very well thank you. Feedback from attendees has been good! Thanks again to you & the team."

"I would like to thank you and your team for organising such a wonderful day, everyone had a ball"

Big Kick Company

"I would like to make a special thank you for the crew, for their ardwork on the day and their very professional style. The team thoroughly enjoyed their company and were pleased that they were able to have a laugh and a joke. For that day, you were like one of the team and not just facilitators - that's a skill not many people have!"

Hayley | NHS

"Thank you very much for the 'Team Dynamics Facilitation Day' you have done for me and the team.

The whole group really enjoyed the challenges having lots of fun and the feedback has since been excellent. It shows we can easily mix Facilitation with Fun! Thanks again"

University of Bedfordshire

"We always collect feedback after such events and the responses in relation to the organisation and enjoyment factor were split equally between "excellent" and "good". No one rated it as either satisfactory or poor. Thank you very much for your help and for such a good afternoon."


"Just wanted to drop you a line to thank you and the rest of the team for your superb efforts at our event yesterday. I was really pleased how it went - much better than I could ever have imagined. It's so different seeing it in action than reading about it.

As soon as I know about the next event, I'll definitely be in touch."

Rewards & Incentives

"All those little extras really made it the best day ever, I had so much great feedback from the team. We laughed so much – thanks a million."

Wanadoo UK

"It was extremely helpful for us to be able to off-set some of the enormous tasks onto you, enabling us to cover the other aspects of the event in the confidence that you had things under control elsewhere. Thank you for your contribution, reliability and stamina."

ABTA Convention Team

"Our evening event was absolutely fabulous! Thank you."

Bradford & Bingley

"We are writing to say a big thank you to your team, it was a brilliant day and everyone clearly had an excellent time."

Cambridge City Council

Contact us if you would like us to send you more testimonials