STEVEN GOODHEART  This latest version of Grammarian Pro has been rock-solid for me (Leopard and my G5 iMac), as was the version before this. Although I did not have some of the stability problems some reviewers in 2007 had with earlier versions, I agree that the program was in need of some bug fixes and updates, and the advent of Leopard seems to have spurred some much needed development and improvements.

As a professional writer and editor, I really love this program and highly recommend it. I've used it for years now and consider it part of my professional "toolbox." It's easy to use and easy to set up, and I especially like how much I can customize Grammarian. You can customize system-wide or program specific hot keys for virtually every function and you can customize the level and type of the grammar and spelling checking (Academic, business, casual, grade level, etc.) to an amazing degree.

The grammar checker, spell checker, thesaurus and dictionary are *far* superior to those in MS Word. Best of all, Grammarian Pro is available system-wide, and the level and kind of grammar checking and spell checking can be customized for each program you use, if you want to -- one kind of checking in MS Word or Scrivener, for example, and another when using a text editor to write code or HTML and another when using it in a web browser, or PIM, or spreadsheet. The level, kind, and amount of checking are up to you.

Of course, there's no substitute for the writer knowing and learning the basic rules of grammar, and getting an "ear" for what good writing sounds like. And GP doesn't catch every mistake, and sometimes it flags non-problems or even makes dubious grammar suggestions. But on the whole I find I'm far less likely to make bonehead grammar mistakes (not to mention spelling errors) when GP has my back, so to speak. GP can be a good learning tool, too. For example, if you're prone to using too much passive voice in your writing, you can set up GP to have it nag you every time it comes across it, and this can be a great way to improve one's writing.

I hope this doesn't sound like an advertisement. I have no relationship with this software or company other than as an end-user. But I do speak as someone who has used this program for years. Grammarian Pro can be a great help to anyone who writes. Version 1.8.1 is a solid update, and I'm happy to give it a 5-star rating based on my daily use of the program.  
(Version 1.8.1)

SAMPLER  It's the only real game for the Mac, but it misses many simple mistakes (just the kind I make):

This is to for me.

The my table is there.

It my will.  
(Version 1.8.3)

ST00P!D M0NK3Y  I just purchased the lastest version 1.7. By far the best grammar/spelling check program I have ever used. Version 1.7 has an insane amount of grammar checking options. I couldn't have asked for a better program. Thanks.  
(Version 1.7)

VANGOCAMBO  This software is great. I'm a bilingual, grammar is not my thing, this software combine with mellel, scrivener, and bookend allow me to finish my thesis with minimal effort. Thanks you for making such a great software.  
(Version 1.8.5)

TOP-SHELF  Top-shelf and a must-have on my Mac. This version further fine-tunes what is already an excellent application. I am still wishing for contextual menu support--this would make GP phenomenal.  
(Version 1.6.2)

GOOD TO GO  I've used this application for a long, long time and when it was held by another company; glad to see it return to its author. I "strongly" do wish that it was contextual menu based versus the menu bar. It would be sooooo much better that way.  
(Version 1.6)

JACK FOSTER MANCILLA  This software has run on my Mac OS X machine since its first release, without any problems. I have updated to version 1.6 on Mac OS X 10.3.9 with no problems.

Grammarian works transparantly, flawlessly, across all my applications.

This is one of the few pieces of software that I would not want to do without.  
(Version 1.6)

ANONYMOUS  After some hours of testing, I decided not to purchase because it can't find some simple grammar errors. For example, it checked "What's time is it?" and reported no errors. For the who, when, what, how... etc, the checking is useless.  
(Version 1.5.2b1)

ANONYMOUS  Laugh if you want, I've been faithful to Corel Word Perfect 2.0's simple, direct grammatical critique for years now, with enough success to warrant my tenacity.

Nevertheless, I do get tired of waiting for Mac Classic to load, so I took Grammarian Pro for a test drive. Challenge #1: a rough draft with which I've been struggling. Grammarian tore it to shreds, much to its benefit. Challenge #2: an essay for which I won a huge, national, first place award. Grammarian wasn't happy with it either--in fact, had I used it before submitting, the essay might have read much differently. Thus, the question: would it have won? Hmm. Challenge #3: critique of this review. Grammarian found five "errors," one of which I chose to correct.

Bottom line: Grammarian is a tough critic. Features are as described, it's extremely easy to use, customizable, and stable. I shall continue my test drive for a while longer but, with a heavy heart, fear I will probably purchase it--having finally found the software to replace my much-beloved Mac Classic Word Perfect 2.0

  
(Version 1.5.2b1)

SHANA  I've grown quite dependent on this utility for my work and was happy to see a free upgrade. Exceptional and nothing like it ever. Keep it up!  
(Version 1.5.1)