Maze Lab says,

We again had an excellent cooperation experience. Jarek fully covered the project and provided his suggestions on architecture and great support.

for Migrate shopping functionality to Drupal on Sep 02, 2011

Maze Lab says,

Jarek has fully covered the project despite there were a few pitfalls. He suggested a solution and implemented a custom Drupal module with a fine coding style. Jarek communicates promptly and provides bugfixing support after the project is complete. We would definitely like to continue our cooperation with him on a future projects.

for Drupal multifield newsletter on Jul 11, 2011