R&D tax troubles

I’m looking at putting in an R&D Tax Credit claim for one of our software products we’ve been developing to combat online credit card fraud, I’m going to use someone like R&D Tax Credit Experts to do this as I feel my current Accountant isn’t up to speed on R&D tax credit claims. Has anyone used these guys? Are they any good? Do you think it’s wise to step away from my current Accountant, just for this bit?