We used their services for our wedding reception in London last year which was such an amazing experience! They made sure that everything went as planned with no issues at all - they were always there when needed but also left us alone whenever it got too much or stressful!! Their prices are very reasonable compared to other companies out there so I would definitely recommend them if looking for professional service providers who care about customer satisfaction.
The only thing is that I think it's better if more than one person can be assigned to work together because sometimes things could get confusing (especially during the planning stage). Also some parts of audio equipment may not come up straight away depending where it needs to go within the venue/room etc., therefore having someone else around might help solve this problem. A really great team! Our whole day ran smoothly thanks to them!